Transmit power limiting method and device

Abstract

The present application proposes a transmission power limitation method and device, which are applied in the field of communications and can solve the problem that the uniform use of the lowest SAR standard to limit the transmission power of mobile terminals cannot achieve the best communication quality in all areas. The method is applied to a mobile terminal, and the application processor of the mobile terminal stores a first preset configuration file including multiple area identifiers and the limited transmission power corresponding to each area identifier. It includes: the modem of the mobile terminal obtains the first limited transmission power of the network for the mobile terminal; the application processor obtains the area identifier of the mobile terminal, reads the second limited transmission power corresponding to the area identifier from the first preset configuration file, and sends it to the modem; the modem sets the second limited transmission power as the transmission power parameter, selects the minimum value of the first limited transmission power and the transmission power parameter as the maximum transmission power, and limits the transmission power of the mobile terminal according to the maximum transmission power.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method and device for limiting transmission power. Background Art

[0002] Specific Absorption Ratio (SAR) refers to the electromagnetic radiation energy absorbed by a unit mass of a substance per unit time. Different regions have different certification standards for the SAR value of mobile terminals in their respective communication frequency bands. Only after the mobile terminal adjusts its own radiation to the SAR certification standard of the corresponding region can it enter the area for normal use.

[0003] Usually, the communication quality of a mobile terminal is related to the transmit power. A higher transmit power can ensure better communication quality. The higher the transmit power of a mobile terminal, the greater the radiation generated. Therefore, in order to make the radiation of a mobile terminal meet the SAR certification standards of the area, it is necessary to limit the transmit power of the mobile terminal.

[0004] Since different regions use different SAR standards, if a unified transmit power limit is used for mobile terminals in different regions, in order to meet the SAR standards of all regions, the lowest SAR standard of all regions needs to be used to limit the transmit power of the mobile terminal. In this way, the mobile terminal cannot achieve the best communication quality in the region with a higher SAR standard. Summary of the invention

[0005] The embodiments of the present application provide a transmission power limiting method and device, which are used to solve the problem of uniformly using the lowest SAR standard in all areas to limit the transmission power of a mobile terminal, and the mobile terminal cannot achieve the best communication quality in an area with a higher SAR standard.

[0006] In a first aspect, the present application provides a transmission power limitation method, which is applied to a mobile terminal, wherein the mobile terminal includes an application processor and a modem, wherein the modem is coupled to the application processor; a first preset configuration file is stored in the application processor, wherein the first preset configuration file includes multiple area identifiers and a limited transmission power corresponding to each area identifier. The limited transmission power corresponding to each area identifier in the first preset configuration file can be set with reference to the SAR standard specified for the area corresponding to the area identifier. The method includes:

[0007] After the mobile terminal is powered on, the modem obtains the first limited transmission power of the network for the mobile terminal. At the same time, after the mobile terminal is powered on, the application processor can obtain the area identifier of the mobile terminal, and read the second limited transmission power corresponding to the area identifier of the mobile terminal from the first preset configuration file; then the application processor sends the second limited transmission power to the modem. After receiving the second limited transmission power, the modem sets the second limited transmission power as the transmission power parameter of the modem; then, the modem uses the first limited transmission power and the second limited transmission power in the transmission power parameter as a transmission power set, and selects the smallest limited transmission power from them as the maximum transmission power of the mobile terminal. Finally, the modem limits the transmission power of the mobile terminal according to the maximum transmission power.

[0008] In the above technical solution, the mobile terminal will dynamically adjust the transmit power parameters in the mobile terminal based on the SAR standard of the area to which it belongs according to the area identification of the mobile terminal. In this way, when the mobile terminal is used in different areas, the transmit power of the mobile terminal can be limited by referring to the maximum transmit power required by the SAR standard of the corresponding area. At the same time, combined with the transmit power limit of the network, it is ensured that the transmit power of the mobile terminal when in use can meet the network's requirements for the transmit power of the mobile terminal. In this way, the mobile terminal can maximize the maximum transmit power of the mobile terminal on the premise of meeting the SAR standard and network requirements of the area where it is located, ensuring that the mobile terminal has better communication quality.

[0009] In a possible implementation of the first aspect, the method further includes: the modem searches for a network after the mobile terminal is powered on, and obtains a regional identifier of the area to which the network belongs. The modem sends the regional identifier of the area to which the network belongs to the application processor. That is, the application processor obtains the regional identifier of the mobile terminal, specifically including: the application processor receives the regional identifier of the area to which the network belongs from the modem, and the application processor uses the regional identifier of the area to which the network belongs as the regional identifier of the mobile terminal. In this way, the maximum transmit power of the mobile terminal can be increased on the premise of meeting the SAR standard specified in the area where the mobile terminal is located and the transmit power limit of the network, thereby improving the communication quality of the mobile terminal.

[0010] In a possible implementation manner of the first aspect, the area identifier of the area to which the network belongs is a mobile country code MCC and / or a public land mobile network PLMN of the area to which the network belongs.

[0011] In a possible implementation of the first aspect, the application processor obtains the regional identification of the mobile terminal, including: the application processor reads the system software identification of the mobile terminal after the mobile terminal is turned on. The system software identification is used to indicate the region to which the supplier of the mobile terminal belongs or the operator version information of the mobile terminal, and the regional identification of the mobile terminal is the regional identification of the region to which the supplier of the mobile terminal belongs or the operator version information of the mobile terminal. In this way, the maximum transmission power of the mobile terminal can be increased on the premise of meeting the SAR standard specified in the region corresponding to the regional identification of the mobile terminal itself and the transmission power limit of the network in the region, thereby improving the communication quality of the mobile terminal.

[0012] In a possible implementation of the first aspect, a user identification SIM card is installed in the mobile terminal. The application processor obtains the regional identification of the mobile terminal, including: the application processor reads the regional identification of the area to which the SIM card belongs. In this implementation, the regional identification of the area to which the SIM card belongs is used as the regional identification of the mobile terminal. In this way, the maximum transmission power of the mobile terminal can be increased on the premise of meeting the SAR standard specified in the corresponding area of ​​the SIM card of the mobile terminal and the transmission power limit of the network in the area, thereby improving the communication quality of the mobile terminal.

[0013] In a possible implementation of the first aspect, a SIM card is installed in the mobile terminal; the first preset configuration file also includes a specific absorption rate SAR level corresponding to each area identifier. In this implementation, before the modem selects the minimum limited transmission power from the transmission power set as the maximum transmission power of the mobile terminal, the method also includes: the application processor obtains the area identifier of the area to which the SIM card belongs; the application processor reads the target SAR level corresponding to the area identifier of the area to which the SIM card belongs from the first preset configuration file, and sends the target SAR level to the modem; the modem receives and parses the target SAR level to obtain a third limited transmission power. In this implementation, the modem uses the first limited transmission power, the third limited transmission power, and the second limited transmission power in the transmission power parameters as the transmission power set. In this way, it can be further ensured that the actual SAR value corresponding to the transmission power of the mobile terminal meets the SAR standard specified in the area where the mobile terminal is located.

[0014] In a possible implementation of the first aspect, the modem limits the transmit power of the mobile terminal according to the transmit power parameter, including: the modem limits the transmit power of the mobile terminal in a preset signal according to the transmit power parameter; wherein the preset signal includes at least one of the following: a signal of a physical random access channel of the mobile terminal, a signal of a physical uplink control channel, a signal of a physical uplink shared channel, and a channel sounding reference signal. In this way, it can be ensured that the actual SAR value of the mobile terminal when in use meets the SAR standard specified in the area where the mobile terminal is located.

[0015] In a second aspect, the present application also provides a method for limiting transmission power, which is applied to a mobile terminal, the mobile terminal includes an application processor and a modem, the application processor is coupled to the modem; a second preset configuration file is stored in the modem, and the second preset configuration file includes multiple area identifiers and a limited transmission power corresponding to each area identifier. The limited transmission power corresponding to each area identifier in the second preset configuration file can be set with reference to the SAR standard specified in the area corresponding to the area identifier. The method includes:

[0016] After the mobile terminal is powered on, the modem obtains the fourth limited transmit power of the network for the mobile terminal. The modem obtains the area identifier of the mobile terminal and reads the fifth limited transmit power corresponding to the area identifier of the mobile terminal from the second preset configuration file. The modem uses the fourth transmit power and the fifth transmit power as a transmit power set, and sets the minimum limited transmit power as the maximum transmit power of the mobile terminal. Then, the modem limits the transmit power of the mobile terminal according to the maximum transmit power.

[0017] In this way, when the mobile terminal is used in different areas, the maximum transmit power required by the SAR standard in the corresponding area can be referred to to limit the transmit power of the mobile terminal. At the same time, combined with the transmit power limit of the network, it is ensured that the transmit power of the mobile terminal when in use can meet the network's requirements for the transmit power of the mobile terminal. In this way, the mobile terminal can maximize the maximum transmit power of the mobile terminal on the premise of meeting the SAR standard and network requirements of the area, ensuring that the mobile terminal has better communication quality.

[0018] In a possible implementation of the second aspect, the modem obtains the regional identification of the mobile terminal specifically by: after the mobile terminal is turned on, the modem searches for the network and obtains the regional identification of the area to which the network belongs. Further, the modem uses the regional identification of the area to which the network belongs as the regional identification of the mobile terminal. In this way, the maximum transmission power of the mobile terminal can be increased on the premise of meeting the SAR standard specified in the area corresponding to the regional identification of the mobile terminal and the transmission power limit of the network in the area, thereby improving the communication quality of the mobile terminal.

[0019] In a possible implementation of the second aspect, the method further includes: after the mobile terminal is turned on, the application processor reads the system software identifier of the mobile terminal and sends the system software identifier to the modem. The system software identifier is used to indicate the region to which the supplier of the mobile terminal belongs or the operator version information of the mobile terminal. In this implementation, the modem uses the system software identifier as the region identifier of the mobile terminal. In this way, the maximum transmission power of the mobile terminal can be increased on the premise of meeting the SAR standard specified in the region corresponding to the region identifier of the mobile terminal itself, thereby improving the communication quality of the mobile terminal.

[0020] In a third aspect, the present application further provides a method for limiting transmission power, which is applied to a mobile terminal, wherein the mobile terminal includes an application processor and a modem, the application processor is coupled to the modem, and a SIM card is installed in the mobile terminal; a third preset configuration file is stored in the application processor, and the third preset configuration file includes a SAR gear corresponding to each area identifier. The method includes:

[0021] After the mobile terminal is turned on, the application processor obtains the area identifier of the area to which the SIM card belongs; wherein the area identifier of the area to which the SIM card belongs includes the MCC and / or PLMN to which the SIM card belongs. The application processor reads the target SAR gear corresponding to the area identifier of the area to which the SIM card belongs from the third preset configuration file, and sends the target SAR gear to the modem. The modem receives and parses the target SAR gear to obtain the sixth restricted transmit power. In addition, the modem obtains the seventh restricted transmit power of the network for the mobile terminal; the modem uses the sixth transmit power and the seventh transmit power as a transmit power set, and selects the smallest restricted transmit power in the transmit power set as the maximum transmit power of the mobile terminal. Then, the modem limits the transmit power of the mobile terminal according to the maximum transmit power.

[0022] In the above technical solution, when the mobile terminal is used in different areas, the maximum transmit power limit of the mobile terminal can be referred to the SAR standard of the area to which the SIM card belongs. At the same time, combined with the network's transmit power limit, it is ensured that the transmit power of the mobile terminal when in use can meet the network's requirements for the mobile terminal's transmit power. In this way, the mobile terminal can maximize the maximum transmit power of the mobile terminal on the premise of meeting the SAR standard and network requirements of the area where it is located, ensuring that the mobile terminal has better communication quality.

[0023] In a fourth aspect, a mobile terminal is provided, comprising: a processor and a memory, the processor comprising an application processor and a modem; the application processor is coupled to the modem; the memory is used to store computer execution instructions, and when the mobile terminal is running, the processor executes the computer execution instructions stored in the memory to enable the mobile terminal to execute a work task reminder method as described in any one of the above-mentioned first aspects.

[0024] In a fifth aspect, a computer-readable storage medium is provided, in which instructions are stored. When the computer-readable storage medium is executed on a mobile terminal, the mobile terminal can execute any one of the work task reminder methods in the first aspect.

[0025] In a sixth aspect, a computer program product comprising instructions is provided, which, when executed on a mobile terminal, enables the mobile terminal to execute any one of the work task reminder methods in the first aspect.

[0026] Among them, the technical effects brought about by any design method in the second to sixth aspects can refer to the technical effects brought about by different design methods in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of a communication system provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of the structure of a mobile terminal provided in an embodiment of the present application;

[0029] Figure 3 A flow chart of a transmission power limiting method provided in an embodiment of the present application;

[0030] Figure 4A A flowchart of another transmission power limiting method provided in an embodiment of the present application;

[0031] Figure 4B A flowchart of another transmission power limiting method provided in an embodiment of the present application;

[0032] Figure 4C A flowchart of another transmission power limiting method provided in an embodiment of the present application;

[0033] Figure 5 A flowchart of another transmission power limiting method provided in an embodiment of the present application;

[0034] Figure 6 A flowchart of another transmission power limiting method provided in an embodiment of the present application;

[0035] Fig. 7AA flowchart of another transmission power limiting method provided in an embodiment of the present application;

[0036] Figure 7B A flowchart of another transmission power limiting method provided in an embodiment of the present application;

[0037] Figure 8 A flowchart of another transmission power limitation method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to pursue better communication quality of mobile terminals, the transmit power of mobile terminals is usually increased. However, the transmit power of mobile terminals is limited by the regulatory requirements of the region where they are located, and the transmit power of mobile terminals is usually limited according to SAR.

[0039] SAR refers to the electromagnetic radiation energy absorbed by a unit mass of a substance per unit time. Different regions use different SAR standards, that is, mobile terminals have different requirements for limiting the transmit power when used in different regions. If a unified transmit power threshold is used to limit the transmit power of a mobile terminal, in order to meet the SAR standards of all regions, the lowest SAR standard of all regions needs to be used to limit the transmit power of the mobile terminal. In this way, although the mobile terminal can meet the SAR standards of each region, it may not be able to achieve the best communication quality in some areas with higher SAR standards.

[0040] To this end, the present application proposes a transmission power limitation method to solve the problem that the transmission power of a mobile terminal is limited by uniformly using the lowest SAR standard in all areas, and the mobile terminal cannot achieve the best communication quality in areas with higher SAR standards.

[0041] The transmission power limitation method is applied to a mobile terminal, by configuring multiple area identifiers and the limited transmission power corresponding to each area identifier in a preset configuration file (such as a first preset configuration file) of the mobile terminal. In this way, after the mobile terminal is turned on, the area identifier of the mobile terminal can be obtained; then the limited transmission power (second limited transmission power) corresponding to the area identifier of the mobile terminal is read from the first preset configuration file, and the second limited transmission power is used as the transmission power parameter of the modem. Afterwards, the mobile terminal can compare the second limited transmission power in the transmission power parameter with the limited transmission power of the mobile terminal obtained by the mobile terminal from the network, and select the minimum value as the maximum transmission power of the mobile terminal. Finally, the transmission power of the mobile terminal is limited according to the maximum transmission power. Among them, the limited transmission power corresponding to each area identifier in the first preset configuration file can be set according to the SAR standard specified in each region.

[0042] In the transmission power limiting method provided in the embodiment of the present application, the mobile terminal will dynamically adjust the transmission power parameters in the mobile terminal based on the SAR standard of the area to which it belongs according to the area identification of the mobile terminal. In this way, when the mobile terminal is used in different areas, the transmission power of the mobile terminal can be limited by referring to the maximum transmission power required by the SAR standard of the corresponding area. At the same time, combined with the transmission power limit of the network, it is ensured that the transmission power of the mobile terminal when in use can meet the network's requirements for the transmission power of the mobile terminal. In this way, the mobile terminal can maximize the maximum transmission power of the mobile terminal on the premise of meeting the SAR standard and network requirements of the area where it is located, ensuring that the mobile terminal has better communication quality.

[0043] The above transmission power limiting method is applied to a mobile terminal. For example, the above mobile terminal may be a mobile phone. Figure 1 Shown is a schematic diagram of the structure of a communication system provided in an embodiment of the present application. Figure 1 The mobile phone 1 shown is the above-mentioned mobile terminal. When the mobile phone 1 searches and registers the network, the mobile phone 1 interacts with the base station 2 in the area where the mobile terminal is located.

[0044] In some embodiments, Figure 2 FIG. 2 is a schematic diagram of the structure of the mobile terminal 200. Figure 2 As shown, the mobile terminal 200 may include a processor 210, a memory 220, a universal serial bus (USB) interface 230, a charging management module 240, a battery 241, an antenna 1, an antenna 2, a mobile communication module 250, a wireless communication module 260, an audio module 270, a sensor module 280, a display screen 290, and a subscriber identification module (SIM) card interface 291, etc.

[0045] Exemplarily, the mobile terminal may be Figure 1 The mobile phone 1 shown in the figure. It is to be understood that the structure shown in the embodiment of the present invention does not constitute a specific limitation on the mobile terminal 200. In other embodiments of the present application, the mobile terminal 200 may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0046] The processor 210 may include one or more processing units, for example, the processor 210 may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a memory, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Among them, different processing units may be independent devices or integrated into one or more processors. For example, in an embodiment of the present application, the processor 210 may be an application processor AP.

[0047] The controller may be the nerve center and command center of the mobile terminal 200. The controller may generate an operation control signal according to the instruction operation code and the timing signal to complete the control of fetching and executing instructions.

[0048] The processor 210 may also be provided with a memory for storing instructions and data. In some embodiments, the memory in the processor 210 is a cache memory. The memory may store instructions or data that the processor 210 has just used or cyclically used. If the processor 210 needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor 210, and thus improves the efficiency of the system.

[0049] In some embodiments, the processor 210 may include one or more interfaces. The interface 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, and / or a USB interface, etc.

[0050] The USB interface 230 is an interface that complies with the USB standard specification, and specifically can be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc. The USB interface 230 can be used to connect a charger to charge the mobile terminal 200, and can also be used to transmit data between the mobile terminal 200 and peripheral devices. It can also be used to connect headphones to play audio through the headphones. The interface can also be used to connect other electronic devices or mobile terminals, such as AR devices, etc.

[0051] It is understandable that the interface connection relationship between the modules illustrated in the embodiment of the present invention is only a schematic illustration and does not constitute a structural limitation on the mobile terminal 200. In other embodiments of the present application, the mobile terminal 200 may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.

[0052] The charging management module 240 is used to receive charging input from a charger. The charger may be a wireless charger or a wired charger. In some embodiments, the mobile terminal 200 may support wired charging. Specifically, the charging management module 240 may receive charging input from a wired charger through the USB interface 230. In other embodiments, the mobile terminal 200 may support wireless charging.

[0053] Among them, the charging management module 240 can also provide power to the mobile terminal 200 while charging the battery 241. The charging management module 240 receives input from the battery 241 and provides power to the processor 210, the memory 220, the display screen 290, and the wireless communication module 260. The charging management module 240 can also be used to monitor parameters such as the battery capacity, battery cycle number, and battery health status (leakage, impedance) of the battery 241. In some other embodiments, the charging management module 240 can also be set in the processor 210.

[0054] The wireless communication function of the mobile terminal 200 can be implemented through the antenna 1, the antenna 2, the mobile communication module 250, the wireless communication module 260, the modem processor and the baseband processor.

[0055] Antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in mobile terminal 200 can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve the utilization of the antennas. For example, antenna 1 can be reused as a diversity antenna for a wireless local area network. In some other embodiments, the antenna can be used in combination with a tuning switch.

[0056] The mobile communication module 250 can provide solutions for wireless communications including 2G / 3G / 4G / 5G applied to the mobile terminal 200. The mobile communication module 250 may include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), etc. The mobile communication module 250 can receive electromagnetic waves from the antenna 1, and filter, amplify, and process the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation. The mobile communication module 250 can also amplify the signal modulated by the modulation and demodulation processor, and convert it into electromagnetic waves for radiation through the antenna 1. In some embodiments, at least some of the functional modules of the mobile communication module 250 can be set in the processor 210. In some embodiments, at least some of the functional modules of the mobile communication module 250 can be set in the same device as at least some of the modules of the processor 210.

[0057] The modem processor may include a modulator and a demodulator. Among them, the modulator is used to modulate the low-frequency baseband signal to be sent into a medium-high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then transmits the demodulated low-frequency baseband signal to the baseband processor for processing. After the low-frequency baseband signal is processed by the baseband processor, it is passed to the application processor. The application processor outputs a sound signal through an audio device, or displays an image or video through a display screen 290. In some embodiments, the modem processor may be an independent device. In other embodiments, the modem processor may be independent of the processor 210 and be set in the same device as the mobile communication module 250 or other functional modules. In some embodiments, the modem processor is also used to limit the transmit power of the mobile terminal according to the maximum transmit power of the mobile terminal; specifically, the modem processor controls the antenna 1 to transmit according to the maximum transmit power of the mobile terminal. Among them, the modem processor is the modem in the embodiment of the present application.

[0058] The wireless communication module 260 can provide wireless communication solutions including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), NFC, infrared technology (IR), etc., applied to the mobile terminal 200. In some embodiments, the antenna 1 of the mobile terminal 200 is coupled to the mobile communication module 250, and the antenna 2 is coupled to the wireless communication module 260, so that the mobile terminal 200 can communicate with the network and other devices through wireless communication technology.

[0059] The mobile terminal 200 implements the display function through a GPU, a display screen 290, and an application processor. The GPU is a microprocessor for image processing, connecting the display screen 290 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 210 may include one or more GPUs that execute program instructions to generate or change display information.

[0060] The display screen 290 is used to display images, videos, etc. The display screen 290 includes a display panel. In some embodiments, the mobile terminal 200 may include 1 or N display screens 290, where N is a positive integer greater than 1.

[0061] The mobile terminal 200 can realize the shooting function through the ISP, the camera 293, the video codec, the GPU, the display screen 290 and the application processor. The ISP is used to process the data fed back by the camera 293. In some embodiments, the ISP can be set in the camera 293. The camera 293 is used to capture a static image or a video. In some embodiments, the mobile terminal 200 may include 1 or N cameras 293, where N is a positive integer greater than 1.

[0062] The memory 220 may be used to store computer executable program codes, which may include instructions. The processor 210 executes various functional applications and data processing of the mobile terminal 200 by running the instructions stored in the memory 220. In addition, the memory 220 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc.

[0063] The mobile terminal 200 can implement audio functions through the audio module 270 and the application processor, etc. For example, music playing, recording, etc. The audio module 270 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signals. In some embodiments, the audio module 270 can be arranged in the processor 210, or some functional modules of the audio module 270 can be arranged in the processor 210.

[0064] The SIM card interface 291 is used to connect a SIM card. The SIM card can be connected to or separated from the mobile terminal 200 by inserting the SIM card interface 291 or pulling the SIM card interface 291 out. The mobile terminal 200 can support 1 or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface 291 can support Nano SIM cards, Micro SIM cards, SIM cards, etc. In some embodiments, the mobile terminal 200 uses an eSIM, i.e., an embedded SIM card. The eSIM card can be embedded in the mobile terminal 200 and cannot be separated from the mobile terminal 200.

[0065] The methods in the following embodiments can all be implemented in a mobile terminal having the above hardware structure.

[0066] The transmission power limiting method proposed in the present application can be applied to a mobile terminal. In an embodiment of the present application, the mobile terminal specifically includes an application processor and a modem, and the application processor and the modem are coupled. A first preset configuration file is stored in the application processor, and the first preset configuration file includes multiple area identifiers and a limited transmission power corresponding to each area identifier.

[0067] The restricted transmit power corresponding to each area identifier in the first preset configuration file may be specifically set with reference to the SAR standard specified for the area corresponding to each area identifier. In the first preset configuration file, when the mobile terminal uses the restricted transmit power corresponding to any area identifier as the maximum transmit power, the actual SAR value of the mobile terminal meets the SAR standard specified for the area corresponding to the area identifier.

[0068] Among them, after the mobile terminal is turned on, the modem obtains the first limited transmission power of the network for the mobile terminal. The application processor obtains the area identifier of the mobile terminal, and then reads the second limited transmission power corresponding to the area identifier of the mobile terminal from the first preset configuration file. The application processor sends the second limited transmission power to the modem. After receiving the second limited transmission power, the modem sets the second limited transmission power as the transmission power parameter. Then, the modem uses the first limited transmission power and the transmission power parameter as the transmission power set, and selects the minimum value in the transmission power set as the maximum transmission power of the mobile terminal. Finally, the modem limits the transmission power of the mobile terminal according to the maximum transmission power.

[0069] In this way, since the limited transmission power corresponding to each area identifier is set with reference to the SAR standard specified in the area corresponding to the area identifier, that is, the above technical solution dynamically adjusts the transmission power parameters in the mobile terminal based on the area identifier of the mobile terminal and the SAR standard of the area to which it belongs. In this way, when the mobile terminal is used in different areas, the transmission power of the mobile terminal can be limited by referring to the maximum transmission power required by the SAR standard of the corresponding area. At the same time, combined with the transmission power limit of the network, it is ensured that the transmission power of the mobile terminal when in use can meet the network's requirements for the transmission power of the mobile terminal. In this way, the mobile terminal can maximize the maximum transmission power of the mobile terminal on the premise of meeting the SAR standard and network requirements of the area where it is located, ensuring that the mobile terminal has better communication quality.

[0070] The following is an explanation of the technical terms that may be involved in the embodiments of the present application.

[0071] The application processor (AP) is the part of the mobile terminal that does not include communication with the base station. The operating system, user interface and application programs are all executed on the AP.

[0072] Modem, including modulator and demodulator. The modem can translate the computer's digital signal into analog signals that can be transmitted along ordinary telephone lines. These analog signals can be received by another modem at the other end of the line and translated into a language that the computer can understand.

[0073] Mobile Country Code (MCC): MCC resources are uniformly allocated and managed by the International Telecommunication Union (ITU) and uniquely identify the country to which a mobile user belongs.

[0074] In a certain country or region, a certain type of cellular mobile communication network of a certain operator is called a Public Land Mobile Network (PLMN). PLMN is a network established and operated by the government or an operator approved by it to provide land mobile communication services to the public.

[0075] The Subscriber Identity Module (SIM) card is an IC card held by mobile users of the Global System for Mobile Communications (GSM) system. The GSM system uses the SIM card to identify GSM users. A GSM mobile terminal can only be used after a SIM card is inserted.

[0076] SAR level indicates the SAR set for each region according to the SAR standards specified for different regions. For example, if the mobile terminal is expected to be used in M ​​regions, then a corresponding SAR value is set for each region ID in the M regions according to the SAR standards specified for each of the M regions. Any region ID in the above M regions and the corresponding SAR value represent the SAR level of the corresponding region.

[0077] The transmit power parameter is one of the readable configuration parameters in the modem, which configures the maximum transmit power allowed by the mobile terminal. The application processor can modify the transmit power parameter in the modem by calling the interface provided by the modem. In some embodiments, the transmit power parameter is also called the radio frequency power NV (a radio frequency parameter stored in a non-volatile memory).

[0078] Physical Random Access Channel (PRACH) is the access channel when the user equipment (UE) initiates a call. After receiving the response message of Fast Physical Access Channel (FPACH), UE will send RRC Connection Request message on PRACH channel according to the information indicated by NodeB to establish RRC connection. RRC (Radio Resource Control) is radio resource control.

[0079] The Physical Uplink Control Channel (PUCCH) is used to carry scheduling requests, Channel Quality Indicator (CQI) feedback, etc.

[0080] The Physical Uplink Shared Channel (PUSCH) is used to carry data from the transmission channel. Sharing means that the same physical channel can be used by multiple users in a time-sharing manner, or the channel has a shorter duration.

[0081] The channel sounding reference signal (SRS) provides a reference for the scheduling of the evolved Node B (a type of base station), specifically, for the uplink channel quality.

[0082] In some embodiments, Figure 3 As shown, the above transmission power limiting method includes S300-S307. Figure 1 The mobile phone 1 shown is used as an example for explanation, wherein:

[0083] S300. Turn on mobile phone 1.

[0084] S301 . The modem of mobile phone 1 obtains a first limited transmission power of the network for mobile phone 1 .

[0085] After turning on the mobile phone 1, it needs to search and register with the network before it can use the mobile services provided by the network, and the network has restrictions on the transmission power of mobile terminals using the network. Among them, the transmission power restricted by the network for the mobile terminal may be related to the actual use of the mobile terminal. Therefore, during the use of the mobile phone 1, the transmission power restrictions of the network for the mobile phone 1 obtained at different times may be different. The modem of the mobile phone 1 can obtain the first transmission power restriction of the network for the mobile phone 1 in real time. In some embodiments, the modem can specifically obtain the first transmission power restriction of the network for the mobile phone 1 from the base station.

[0086] In some embodiments, the modem obtains the first limited transmission power of the network for the mobile phone 1, which may be specifically the modem obtaining the limited transmission power of the network mobile terminal issued by the base station during the process of searching the network. In other embodiments, the modem obtains the first limited transmission power of the network for the mobile phone 1, which may be the mobile phone 1 obtaining the limited transmission power of the network for the mobile terminal issued by the base station during the process of using the mobile service provided by the network.

[0087] The first limited transmission power is the limited transmission power that the mobile phone 1 must follow when using the mobile service provided by the network. Therefore, when limiting the transmission power of the mobile phone 1, it is necessary to limit the transmission power of the mobile phone 1 in combination with the above-mentioned first limited transmission power.

[0088] S302 . The application processor of mobile phone 1 obtains the region identifier of mobile phone 1 .

[0089] The region identification of mobile phone 1 is used to indicate the region to which mobile phone 1 belongs. In some embodiments, the region to which mobile phone 1 belongs may be the region to which the network registered after mobile phone 1 is turned on belongs, or the region indicated by the system software in mobile phone 1, or the region to which the SIM card installed in mobile phone 1 belongs.

[0090] Taking the area to which the mobile phone 1 belongs as the area to which the network registered after the mobile phone 1 is turned on as an example, the modem can search for the network after the mobile phone 1 is turned on, and obtain the area identifier of the area to which the network belongs.

[0091] Please refer to Figure 4A After S300, the method further includes S401 and S402.

[0092] S401. The modem searches the network and obtains the area identifier of the area to which the network belongs.

[0093] After the mobile terminal is turned on, it needs to search and register the network. After the mobile terminal successfully registers the network and attaches to the mobile network, the mobile terminal can use the relevant mobile services provided by the network. In some embodiments, after the mobile phone 1 is turned on, the modem searches for the network and registers the network. The purpose of the modem searching the network is to search for the network available to the SIM card installed on the mobile phone 1. After searching for the network available to the SIM card, the modem can initiate a registration request to the network; the purpose of registering the network is to enable the SIM card to use the mobile services provided by the network.

[0094] It should be noted that the above process of the modem searching for a network and registering a network after the mobile phone 1 is turned on can be described in the relevant technology and will not be repeated in the embodiment of the present application.

[0095] After the modem searches for and registers a network, it can interact with a base station of the registered network, and then obtain an area identifier of an area to which the network belongs from the base station of the network.

[0096] S402. The modem sends the area identifier of the area to which the network belongs to the application processor.

[0097] From the description of the above embodiment, it can be seen that the first preset configuration file stored in the application processor stores the restricted transmission power corresponding to multiple area identifiers. After the modem obtains the area identifier of the area to which the network belongs, it sends the area identifier of the area to which the network belongs to the application processor, and the application processor can read the restricted transmission power corresponding to the area identifier of the area to which the network belongs from the first preset configuration file.

[0098] Furthermore, in this embodiment, if Figure 4A As shown, S302 may specifically be S302a.

[0099] S302a. The application processor receives the region identifier of the region to which the network belongs from the modem.

[0100] In this embodiment, the area identifier of the mobile phone 1 is the area identifier of the area to which the network belongs, that is, the first preset configuration file includes the area identifiers of the areas to which each network belongs and the limited transmission power corresponding to the area identifiers of the areas to which each network belongs.

[0101] In some embodiments, the area identifier of the area to which the network belongs is the MCC and / or PLMN of the area to which the network belongs. Since different areas use different SAR standards, for the MCC and PLMN of a certain area, a limited transmit power that meets the SAR standard of the corresponding area can be pre-set in the first preset configuration file. After the application processor obtains the MCC and PLMN of the area to which the network belongs, the limited transmit power corresponding to the area identifier is obtained according to the first preset configuration file.

[0102] In the technical solution provided by the embodiment of the present application, the regional identifier of the area to which the network belongs obtained by the modem is used as the regional identifier of the mobile phone 1, and as one of the limiting factors of the transmission power of the mobile phone 1. In this way, the maximum transmission power of the mobile phone 1 can be increased on the premise of meeting the SAR standard specified in the area corresponding to the regional identifier of the mobile phone 1 and the transmission power limit of the network in the area, thereby improving the communication quality of the mobile phone 1.

[0103] When mobile phone manufacturers promote the use of mobile phones in different regions, in order to make the mobile phones adapt to the requirements of the region for mobile phones, the usage habits of users in the region, etc., they can use different system software versions in the mobile phones used in the region from those in other regions. That is, the system software versions used in mobile phones in different regions are different. In this embodiment, take the region to which mobile phone 1 belongs as the region indicated by the system software version as an example, Figure 4B As shown, S302 of the above method may specifically be S302b.

[0104] S302b. The application processor reads the system software identification of the mobile phone 1.

[0105] The system software identifier of the mobile phone 1 is used to distinguish different system software versions used by the mobile phone 1 in different regions.

[0106] The same mobile phone supplier usually provides mobile phones to the same region. In some embodiments, the same system software version can be used in all mobile phones supplied by the same mobile phone supplier. In this embodiment, the system software identifier can be used to indicate the region to which the supplier of the mobile phone 1 belongs.

[0107] One or more operators may be included in the same region, and mobile phone manufacturers may cooperate with operators to launch operator customized versions. In some embodiments, the same system software version may be used in mobile phones of the same operator version. In this embodiment, the system software identifier may be used to indicate the operator version information of the mobile phone 1.

[0108] The operator refers to a supplier that provides network services to terminals such as mobile phones 1.

[0109] In other embodiments, the regional identifier of the region to which the supplier of the mobile phone 1 belongs or the operator version information of the mobile phone 1 may also be separately configured in the mobile phone 1. In this embodiment, the application processor obtains the regional identifier information of the mobile phone 1, and specifically, the application processor directly obtains the regional identifier of the region to which the supplier of the mobile phone 1 belongs or the operator version information of the mobile phone 1 as the regional identifier of the mobile phone 1.

[0110] It should be noted that if Figure 4B In the embodiment shown, the mobile phone 1 may first execute S301 and then execute S302b, or first execute S302b and then execute S301; or the mobile phone 1 may also execute S301 and S302b simultaneously. The order of S301 and S302b is not limited in the embodiment of the present application.

[0111] Among them, in the embodiment where the mobile phone 1 first executes S302b and then executes S301, the application processor can obtain the system software identification of the mobile phone 1 immediately after the phone is turned on, and can also obtain the regional identification or operator version information of the region to which the supplier of the mobile phone 1 belongs indicated by the system software identification, without waiting until the modem searches for the registered network. In this embodiment, before the modem searches for the registered network, the mobile phone 1 can obtain the corresponding limited transmission power according to the regional identification or operator version information of the region to which the supplier of the mobile phone 1 belongs. And the transmission power of the mobile phone 1 is limited according to the limited transmission power determined according to the system software identification. Among them, the specific method of limiting the transmission power of the mobile phone 1 can refer to the description in the following embodiment, which will not be repeated here.

[0112] Since the limited transmission power corresponding to the system software identification of the mobile phone 1 usually meets the SAR standard specified in the region to which the SIM card belongs, the transmission power of the mobile phone 1 can be limited to the required transmission power as soon as possible after the mobile phone 1 is turned on, thereby reducing the possibility that the use of the mobile phone 1 does not meet the regional regulations of the mobile phone 1 and ensuring that the use of the mobile phone 1 meets the regulations of the region of the mobile phone 1.

[0113] In the technical solution provided in the embodiment of the present application, the region to which the supplier of the mobile phone 1 belongs or the operator version information of the mobile phone 1 is used as the regional identification of the mobile phone 1, and as one of the limiting factors of the transmission power of the mobile phone 1. In this way, the maximum transmission power of the mobile phone 1 can be increased on the premise of meeting the SAR standard specified in the region corresponding to the regional identification of the mobile phone 1 itself, thereby improving the communication quality of the mobile phone 1. In addition, the transmission power of the mobile phone 1 can meet the requirements of the corresponding region without waiting for the search for the registered network to be completed, which can reduce the possibility that the use of the mobile phone 1 does not comply with the regional regulations of the mobile phone 1, and ensure that the use of the mobile phone 1 complies with the regulations of the region of the mobile phone 1.

[0114] Take the area to which mobile phone 1 belongs as an example, where the area to which the SIM card installed in mobile phone 1 belongs. Figure 4C As shown, the above S302 may specifically be S302c.

[0115] S302c. The application processor reads the region identifier of the region to which the SIM card belongs.

[0116] Among them, the regional identifier of mobile phone 1 is the regional identifier of the region to which the SIM card belongs. The operators used in different regions are different, and the SIM cards are also different, that is, the SIM card used by mobile phone 1 is also associated with the region. In this embodiment, after mobile phone 1 is turned on, the application processor can obtain the regional identifier of the region to which the SIM card installed in mobile phone 1 belongs, and use the regional identifier of the region to which the SIM card belongs as the regional identifier of mobile phone 1. Among them, the specific process of the application processor obtaining the regional identifier of the region to which the SIM card belongs can refer to the introduction in the relevant technology, and will not be repeated in the embodiment of this application.

[0117] In some embodiments, the area identifier of the area to which the SIM card belongs may specifically be the MCC and / or PLMN to which the SIM card belongs.

[0118] It should be noted that if Figure 4C In the embodiment shown, the mobile phone 1 may execute S301 first and then S302c, or may execute S302c first and then S301; or may execute S301 and S302c simultaneously. The order of S301 and S302c is not limited in the embodiment of the present application.

[0119] In the embodiment where the mobile phone 1 first executes S302c and then executes S301, the application processor can obtain the regional identifier of the area to which the SIM card belongs immediately after powering on, without waiting until the modem completes searching for the registered network. In this embodiment, before the modem completes searching for the registered network, the mobile phone 1 can limit the transmission power of the mobile phone 1 according to the limited transmission power corresponding to the regional identifier of the area to which the SIM card belongs. Since the limited transmission power corresponding to the regional identifier of the area to which the SIM card belongs usually meets the SAR standard specified in the area to which the SIM card belongs. Therefore, the transmission power of the mobile phone 1 can be limited to the required transmission power as soon as possible after the mobile phone 1 is turned on, thereby reducing the possibility that the use of the mobile phone 1 does not comply with the regional regulations of the mobile phone 1 and ensuring that the use of the mobile phone 1 complies with the regulations of the area of ​​the mobile phone 1.

[0120] In the technical solution provided in the embodiment of the present application, the regional identifier of the region to which the SIM card installed in the mobile phone 1 belongs is used as the regional identifier of the mobile phone 1, and as one of the limiting factors of the transmission power of the mobile phone 1. In this way, the maximum transmission power of the mobile phone 1 can be increased on the premise of meeting the SAR standard specified in the region corresponding to the regional identifier of the SIM card of the mobile phone 1, thereby improving the communication quality of the mobile phone 1. In addition, the transmission power of the mobile phone 1 can meet the requirements of the corresponding region without waiting for the search for the registered network to be completed, which can reduce the possibility that the use of the mobile phone 1 does not comply with the regional regulations of the mobile phone 1, and ensure that the use of the mobile phone 1 complies with the regulations of the region of the mobile phone 1.

[0121] S303 . The application processor reads the second limited transmission power corresponding to the area identifier of the mobile phone 1 from the first preset configuration file.

[0122] As can be seen from the description of the above embodiment, the first preset configuration file stored in the application processor includes multiple area identifiers and the restricted transmission power corresponding to each area identifier. Therefore, after the application processor obtains the area identifier of the mobile phone 1, the restricted transmission power corresponding to the area identifier of the mobile phone 1 can be read according to the first preset configuration file. In this embodiment, the restricted transmission power corresponding to the area identifier of the mobile phone 1 is recorded as the second restricted transmission power.

[0123] In some embodiments, the application processor reads a second limited transmission power corresponding to the area identifier of mobile phone 1 from the first preset configuration file, which may specifically include: the application processor searches for the area identifier of mobile phone 1 in the first preset configuration file, and if the area identifier of mobile phone 1 is found in the first preset configuration file, then reads the limited transmission power corresponding to the area identifier as the second limited transmission power of mobile phone 1.

[0124] S304. The application processor sends a second limited transmit power to the modem.

[0125] In some embodiments, the transmit power of the mobile phone 1 is limited according to the limited transmit power, specifically, the modem limits the transmit power of the antenna of the mobile phone 1. Therefore, after the application processor reads the second limited transmit power corresponding to the network to which the mobile phone 1 belongs from the first preset configuration file, the application processor sends the second limited transmit power to the modem.

[0126] In some embodiments, in S304, the application processor may send the second limited transmit power to the modem by calling an interface provided by the modem, wherein the second limited transmit power is used by the modem to write the second limited transmit power into a transmit power parameter in the modem.

[0127] S305. The modem receives the second limited transmit power from the application processor, and sets the second limited transmit power as a transmit power parameter of the modem.

[0128] As can be seen from the above description, the transmission power parameter of the modem indicates the maximum transmission power allowed by the mobile terminal for the mobile phone 1 itself. In this embodiment, after receiving the second limited transmission power, the modem sets the second limited transmission power as the transmission power parameter, that is, the maximum transmission power required by the mobile phone 1 for itself is the second limited transmission power.

[0129] S306 . The modem selects the minimum limited transmission power from the transmission power set as the maximum transmission power of mobile phone 1 .

[0130] The transmit power set includes a first limited transmit power and a transmit power parameter.

[0131] From the description of the above embodiment, it can be seen that when the mobile phone 1 uses the mobile service provided by the registered network, it needs to follow the first limit transmission power of the network for the mobile terminal. At the same time, in order to meet the mobile phone 1's own transmission power requirements, the mobile phone 1 also needs to meet the above transmission power parameter restrictions.

[0132] Therefore, in this embodiment, after S305, the first transmission power and the transmission power parameter (ie, the second transmission power) are used as a transmission power set. Then, the modem selects the minimum limited transmission power from the transmission power set as the maximum transmission power of the mobile phone 1.

[0133] S307. The modem limits the transmission power of the mobile phone 1 according to the maximum transmission power.

[0134] In some embodiments, the modem limits the transmission power of the mobile phone 1 according to the maximum transmission power. Specifically, the modem controls the antenna of the mobile phone 1 to transmit at the maximum transmission power according to the maximum transmission power; or the modem controls the antenna to transmit at a transmission power not higher than the maximum transmission power.

[0135] In some embodiments, the above S307 may specifically include: the modem limits the transmit power of the mobile phone 1 in the preset signal according to the maximum transmit power. The preset signal includes at least one of the following: a signal of the physical random access channel of the mobile phone 1, a signal of the physical uplink control channel, a signal of the physical uplink shared channel, and a channel sounding reference signal.

[0136] When the modem limits the transmission power of the mobile phone 1 according to the maximum transmission power, the transmission power of each preset signal of the mobile phone 1 will be limited according to the maximum transmission power, ensuring that the actual SAR value of the mobile phone 1 when in use meets the SAR standard specified in the area of ​​the mobile phone 1.

[0137] It should be noted that the region identifiers contained in the first preset configuration file stored by the application processor may be region identifiers of all known regions, or may only include region identifiers of some regions in the known regions. When the first preset configuration file only includes region identifiers of some regions, between S302 and S303, the method further includes: the application processor searches the first preset configuration file for the region identifier of mobile phone 1. If the application processor detects that the region identifier of mobile phone 1 exists in the first preset configuration file, S303 is executed.

[0138] In other embodiments, if the application processor detects that the area identifier of the mobile phone 1 does not exist in the first preset configuration file, the application processor can obtain a default limited transmission power as the second limited transmission power. The default limited transmission power meets the SAR standards specified in all known areas. The specific value of the default limited transmission power can be set according to actual conditions. In some embodiments, the default limited transmission power can also be pre-stored in the first preset configuration file of the application processor. In this way, even if the limited transmission power corresponding to the area identifier of the mobile phone 1 cannot be obtained in the first preset configuration file, it can be ensured that the actual SAR value corresponding to the transmission power of the mobile phone 1 when in use meets the SAR standard specified in the area where the mobile phone 1 is located.

[0139] In the technical solution provided in the embodiment of the present application, the mobile phone 1 will dynamically adjust the transmission power parameters in the mobile phone 1 based on the SAR standard of the area to which it belongs according to the area identification of the mobile phone 1. In this way, when the mobile phone 1 is used in different areas, the transmission power of the mobile phone 1 can be limited by referring to the maximum transmission power required by the SAR standard of the corresponding area. At the same time, combined with the transmission power limit of the network, it is ensured that the transmission power of the mobile phone 1 when in use can meet the network's requirements for the transmission power of the mobile phone 1. In this way, the mobile phone 1 can maximize the maximum transmission power of the mobile phone 1 on the premise of meeting the SAR standard and network requirements of the area where it is located, ensuring that the mobile phone 1 has better communication quality.

[0140] In some embodiments, the configuration file stored in the application processor of the mobile phone 1 also includes the SAR level. When limiting the transmit power of the mobile phone 1, the limited transmit power specified by the SAR level of the configuration file also needs to be met.

[0141] Among them, the SAR level can be set to a universal SAR level. The universal SAR level can be determined according to the SAR standards specified in most regions, and can be a level that meets the SAR standards specified in most regions. The universal SAR level may be higher than the SAR standards specified in some regions, such as region A; and the universal SAR level may be lower than the SAR standards specified in some regions, such as region B.

[0142] When the mobile phone 1 configured with a universal SAR level is used in the above-mentioned area A, if the modem limits the transmit power of the mobile phone 1 according to the maximum transmit power corresponding to the SAR level, the actual SAR value of the mobile phone 1 may not meet the SAR standard specified in the above-mentioned area A. Therefore, before S306, the above-mentioned method further includes:

[0143] Therefore, the application processor reads the SAR level from the configuration file after the mobile phone 1 is turned on, and sends the SAR level to the modem. The modem receives and analyzes the SAR level to obtain the limited transmission power corresponding to the SAR level.

[0144] In this embodiment, the transmission power set in S306 includes: the first limited transmission power, the transmission power parameter and the third limited transmission power. That is, the limited transmission power corresponding to the SAR gear of the modem, the first limited transmission power and the second limited transmission power are used as the transmission power set, and the minimum transmission power is selected from them as the maximum transmission power of the mobile phone 1. In this way, it can be ensured that the SAR value actually transmitted by the mobile phone 1 meets the SAR standard specified in the area where the mobile phone 1 is located.

[0145] In other embodiments, considering that different regions have different SAR standards, multiple region identifiers and SAR levels corresponding to each region identifier may also be configured in the first preset configuration file. Figure 5 , the above method further includes S501-S504 before S306. It should be noted that, in this embodiment, a SIM card is installed in the mobile phone 1. Among them:

[0146] S501. The application processor obtains the area identifier of the area to which the SIM card belongs.

[0147] S502: The application processor reads a target SAR level corresponding to the area identifier of the area to which the SIM card belongs from the first preset configuration file.

[0148] Since the first preset configuration file stored in the application processor also includes the SAR level corresponding to each regional identifier, after the application processor obtains the regional identifier of the region to which the SIM card belongs, the application processor can read the SAR level corresponding to the regional identifier of the region to which the SIM card belongs from the first preset configuration file. In this embodiment, the SAR level corresponding to the regional identifier of the region to which the SIM card belongs is recorded as the target SAR level. The target SAR level indicates the SAR standard specified for the region to which the SIM card belongs.

[0149] S503. The application processor sends the target SAR level to the modem.

[0150] S504: The modem receives and analyzes the target SAR level to obtain a third limited transmit power.

[0151] Each SAR level corresponds to a limited transmit power. After the modem receives the target SAR level, it can parse the target SAR level to obtain the limited transmit power corresponding to the target SAR level, which is recorded as the third limited transmit power.

[0152] In some embodiments, a first preset configuration file is stored in the modem, and the first preset configuration file stored in the modem includes multiple SAR gears and the limited transmission power corresponding to each SAR gear. After the modem receives the target SAR gear, the target SAR gear can be searched in the first preset configuration file stored in the modem, and the limited transmission power corresponding to the target SAR gear can be read therefrom.

[0153] Among them, mobile phone 1 can execute the above S301-S305 and then execute S501-S504; it can also execute S501-S504 first and then execute S301-S305; or mobile phone 1 can execute the above S301-S305 at the same time and then execute S501-S504. The embodiment of the present application does not limit the order of S301-S305 and S501-S504.

[0154] Furthermore, in this embodiment, the transmit power set also includes a third limited transmit power. That is, in the above S306, the modem selects the minimum limited transmit power among the first limited transmit power, the transmit power parameter, and the third limited transmit power as the maximum transmit power of the mobile phone 1. In the technical solution provided in the embodiment of the present application, it can be ensured that the actual SAR value corresponding to the transmit power of the mobile phone 1 meets the SAR standard specified in the area of ​​the mobile phone 1.

[0155] Above Figure 3-Figure 5 The transmission power limitation method shown is to pre-configure multiple area identifiers and information such as the limited transmission power corresponding to each area identifier in a first preset configuration file, and store the first preset configuration file in an application processor. After the mobile phone 1 is turned on, the application processor reads the corresponding limited transmission power in the first preset configuration file based on the acquired area identifier of the mobile phone 1. In other embodiments, a preset configuration file (such as a second preset configuration file) that stores multiple area identifiers and information such as the limited transmission power corresponding to each area identifier may also be stored in a modem. In this embodiment, after the mobile phone 1 is turned on, the corresponding limited transmission power is read from the second preset configuration file based on the area identifier of the mobile phone 1 through the modem, and the transmission power of the mobile phone 1 is limited.

[0156] In some embodiments, the present application also provides a transmission power limitation method. Similarly, the transmission power limitation method can be applied to Figure 1 In this embodiment, a second preset configuration file is stored in the modem of the mobile phone 1, and the second preset configuration file includes multiple area identifiers and the limited transmission power corresponding to each area identifier. Figure 6 As shown, the method includes S600-S605. Among them:

[0157] S600. Turn on mobile phone 1.

[0158] S601 . The modem obtains the fourth limited transmission power of the network for the mobile phone 1 .

[0159] S602. The modem obtains the regional identifier of mobile phone 1.

[0160] According to the above embodiment, the region identification of the mobile phone 1 is used to indicate the region to which the mobile phone 1 belongs. The region to which the mobile phone 1 belongs may be: the region to which the network registered after the mobile phone 1 is turned on belongs, the region indicated by the system software version in the mobile phone 1, or the region to which the SIM card installed in the mobile phone 1 belongs.

[0161] In some embodiments, when the area to which mobile phone 1 belongs is the area to which the network registered after mobile phone 1 is turned on belongs, the modem obtains the area identifier of mobile phone 1 by: the modem searches the network after S600 and obtains the area identifier of the area to which the network belongs. In this embodiment, the area identifier of the area to which the network belongs is used as the area identifier of mobile phone 1.

[0162] In other embodiments, when the region to which the mobile phone 1 belongs is the region indicated by the system software version of the mobile phone 1, such as Fig. 7A As shown, between S600 and S602, the above method further includes S701 and S702. Wherein:

[0163] S701 . The application processor reads the system software identification of the mobile phone 1 .

[0164] S702. The application processor sends the system software identifier of the mobile phone 1 to the modem.

[0165] Please continue to refer to Fig. 7A In this embodiment, S602 may specifically be S602a.

[0166] S602a. The modem receives the system software identification of the mobile phone 1 from the application processor.

[0167] The system software identifier is used to indicate the region to which the supplier of the mobile phone 1 belongs or the operator version information of the mobile phone 1. In this embodiment, the region identifier of the mobile phone 1 is the identifier of the region to which the supplier of the mobile phone 1 belongs or the operator version information of the mobile phone 1.

[0168] Among them, mobile phone 1 can execute S601 first, then execute S701, S702 and S602a, or can execute S701, S702 and S602a first, then execute S601, or can execute S601 and S701, S702 and S602a at the same time. In the embodiment of the present application, the order of S601 and S701, S702 and S602a is not limited.

[0169] In some other embodiments, when the area to which the mobile phone 1 belongs is the area to which the SIM card installed in the mobile phone 1 belongs, between S600 and S602, such as Figure 7B As shown, the above method also includes S703 and S704. Wherein:

[0170] S703: The application processor reads the region identifier of the region to which the SIM card belongs, wherein the region identifier of the mobile phone 1 is the region identifier of the region to which the SIM card belongs.

[0171] S704. The application processor sends the region identifier of the region to which the SIM card of mobile phone 1 belongs to the modem.

[0172] In this embodiment, the above S602 may specifically be S602b.

[0173] S602b. The modem receives the region identifier of the region to which the SIM card of the mobile phone 1 belongs from the application processor.

[0174] Among them, mobile phone 1 can execute S601 first, then execute S703, S704 and S602b, or can execute S703, S704 and S602b first, then execute S601, or can execute S601 and S703, S704 and S602b at the same time. In the embodiment of the present application, the order of S601 and S703, S704 and S602b is not limited.

[0175] In the above embodiments, the area to which the network searched by the mobile phone 1 belongs, the area indicated by the system software version of the mobile phone 1, and the area to which the SIM card belongs are respectively used as the area indicated by the area identifier of the mobile phone 1. On the premise of satisfying the SAR standard specified for the area corresponding to the area identifier of the mobile phone 1 and the transmission power limit of the network in the area, the maximum transmission power of the mobile phone 1 can be increased, thereby improving the communication quality of the mobile phone 1.

[0176] S603 . The modem reads the fifth limited transmission power corresponding to the area identifier of the mobile phone 1 from the second preset configuration file.

[0177] S604 . The modem uses the minimum limited transmit power in the transmit power set as the maximum transmit power of mobile phone 1 .

[0178] The transmit power set includes a fourth limited transmit power and a fifth limited transmit power.

[0179] S605. The modem limits the transmission power of the mobile phone 1 according to the maximum transmission power.

[0180] In the embodiment of the present application, a plurality of area identifiers and the limited transmission power corresponding to each area identifier are pre-stored in a second preset configuration file in the modem. After the mobile terminal is turned on, the modem reads the corresponding fifth limited transmission power from the second preset configuration file according to the acquired area identifier of the mobile terminal. The transmission power of the mobile terminal is limited by combining the fifth limited transmission power and the fourth limited transmission power required by the network.

[0181] In this way, when the mobile phone 1 is used in different areas, the maximum transmission power required by the SAR standard in the corresponding area can be referred to to limit the transmission power of the mobile terminal. At the same time, combined with the transmission power limit of the network, it is ensured that the transmission power of the mobile terminal when in use can meet the network's requirements for the transmission power of the mobile terminal. In this way, the mobile terminal can maximize the maximum transmission power of the mobile phone 1 on the premise of meeting the SAR standard and network requirements of the area, ensuring that the mobile phone 1 has better communication quality.

[0182] In some embodiments, Figure 6 In the transmission power limiting method shown, the application processor can also read the SAR gear set by the mobile phone 1 from the preset configuration file stored in the application processor after the mobile phone 1 is turned on. Then the application processor sends the SAR gear to the modem. After the modem receives the SAR gear, it parses and obtains the limited transmission power corresponding to the SAR gear. In this embodiment, the transmission power set in S604 also includes the limited transmission power corresponding to the SAR gear.

[0183] In other embodiments, the preset configuration file stored in the application processor includes multiple regions and SAR gears corresponding to the regional identifiers. After the mobile phone 1 is turned on, the application processor obtains the regional identifier of the mobile phone 1. The application processor reads the target SAR gear corresponding to the regional identifier of the mobile phone 1 from the preset configuration file stored in the application processor, and sends the target SAR gear to the modem. The modem obtains the corresponding limited transmit power according to the target SAR gear, and uses the limited transmit power corresponding to the target SAR gear obtained in this embodiment as one of the transmit power sets.

[0184] about Figure 6-7A , Figure 7B The transmission power limiting method in the embodiment shown in the figure, wherein various possible specific implementations have been described above. Figure 3-Figure 5 The illustrated embodiments have been described in detail and will not be described in detail here.

[0185] In the related art, the corresponding SAR gears are not set for all known areas, so in the embodiment of the present application, another transmission power limitation method is also provided, by setting corresponding SAR gears for more known areas in the preset configuration file of the application processor. In this way, after the mobile phone 1 is turned on and used in any area, the actual SAR value corresponding to the transmission power of the mobile phone 1 can meet the SAR standard specified in the area.

[0186] The transmission power limiting method proposed in this embodiment is applied to the mobile phone 1. A SIM card is installed in the mobile phone 1. A third preset configuration file is stored in the application processor of the mobile phone 1. The third preset configuration file includes the SAR level corresponding to each area identifier. Figure 8 As shown, the method includes S800-S807. Among them:

[0187] S800. Turn on mobile phone 1.

[0188] S801. The application processor obtains the regional identifier of the area to which the SIM card belongs; wherein the regional identifier of the area to which the SIM card belongs includes the MCC and / or PLMN to which the SIM card belongs;

[0189] S802. The application processor reads a target SAR level corresponding to the area identifier of the area to which the SIM card belongs from a third preset configuration file.

[0190] S803. The application processor sends the target SAR level to the modem.

[0191] S804. The modem receives and analyzes the target SAR level to obtain a sixth limited transmit power.

[0192] S805 . The modem obtains the seventh limited transmission power of the network for the mobile phone 1 .

[0193] S806. The modem uses the minimum limited transmission power in the transmission power set as the maximum transmission power of the mobile phone 1; wherein the transmission power set includes the sixth limited transmission power and the seventh limited transmission power.

[0194] S807. The modem limits the transmission power of the mobile phone 1 according to the maximum transmission power.

[0195] In the embodiment of the present application, in the third preset configuration file stored in the application processor, corresponding SAR gears are set for more known areas according to the SAR standards specified in the respective areas. After the mobile terminal is turned on, the sixth limited transmission power specified in the area is determined according to the SAR gear corresponding to the area to which the SIM card of the mobile terminal belongs, and then the modem determines the maximum transmission power of the mobile terminal in combination with the seventh limited transmission power required by the network. In this way, when the mobile phone 1 is used in different areas, the transmission power of the mobile terminal can be limited by referring to the maximum transmission power limit of the SAR standard of the area to which the SIM card belongs. At the same time, combined with the transmission power limit of the network, it is ensured that the transmission power of the mobile terminal when in use can meet the network's requirements for the transmission power of the mobile terminal. In this way, the mobile terminal can maximize the maximum transmission power of the mobile terminal on the premise of meeting the SAR standards and network requirements of the area where it is located, thereby ensuring that the mobile terminal has better communication quality.

[0196] about Figure 8 The transmission power limiting method in the embodiment shown in the figure, wherein various possible specific implementations have been described above. Figure 5 S501 - S504 are described in detail in the illustrated embodiment and will not be elaborated on here.

[0197] In some other embodiments of the present application, a mobile terminal is provided, the mobile terminal comprising: a processor and a memory; wherein the processor comprises an application processor and a modem, the application processor and the modem are coupled; the memory is coupled to the processor. The memory stores computer program code, the computer program code comprises computer instructions, and when the computer instructions are executed by the processor, the mobile terminal executes each function or step executed by the mobile phone 1 in the method embodiment. The structure of the mobile terminal can refer to Figure 2 The structure of the mobile phone 1 is shown. Specifically, the mobile terminal may be the mobile phone 1.

[0198] The embodiment of the present application also provides a computer-readable storage medium, which includes computer instructions. When the computer instructions are executed on the above-mentioned mobile terminal (such as mobile phone 1), the mobile terminal executes each function or step executed by mobile phone 1 in the above-mentioned method embodiment.

[0199] The present application also provides a computer program product, which, when executed on a computer, enables the computer to execute the functions or steps executed by the mobile phone 1 in the above method embodiment. The computer may be a mobile terminal, such as the mobile phone 1.

[0200] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0201] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0202] The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0203] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0204] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0205] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application shall be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for limiting transmission power, characterized in that: The method is applied to a mobile terminal, the mobile terminal includes an application processor and a modem, the modem is coupled to the application processor; the application processor stores a first preset configuration file, the first preset configuration file includes multiple area identifiers and a limited transmission power corresponding to each area identifier; the method includes: After the mobile terminal is powered on, the modem obtains from the base station a first limited transmission power of the network for the mobile terminal; The application processor obtains a region identifier of the mobile terminal; The application processor reads a second limited transmission power corresponding to the area identifier of the mobile terminal from the first preset configuration file; The application processor calls the interface provided by the modem to send the second limited transmit power to the modem; The modem modifies a transmit power parameter of the modem to the second limited transmit power in response to receiving the second limited transmit power from the application processor; the transmit power parameter is a configuration parameter in the modem, used to indicate the maximum transmit power that the mobile terminal allows itself to use; The modem selects a minimum limited transmit power from a transmit power set as the maximum transmit power of the mobile terminal; wherein the transmit power set includes the first limited transmit power and the transmit power parameter; The modem transmits at the maximum transmit power.

2. The method according to claim 1, characterized in that The method further comprises: The modem searches for a network after the mobile terminal is powered on, and obtains an area identifier of an area to which the network belongs; The modem sends, to the application processor, an area identifier of an area to which the network belongs; The application processor obtaining the area identifier of the mobile terminal includes: The application processor receives the area identifier of the area to which the network belongs from the modem; wherein the area identifier of the mobile terminal is the area identifier of the area to which the network belongs.

3. The method according to claim 2, characterized in that The area identifier of the area to which the network belongs is the mobile country code MCC and / or the public land mobile network PLMN of the area to which the network belongs.

4. The method according to claim 1, characterized in that The application processor obtains the area identifier of the mobile terminal, including: The application processor reads the system software identifier of the mobile terminal after the mobile terminal is turned on; The system software identifier is used to indicate the region to which the mobile terminal's supplier belongs or the operator version information of the mobile terminal; the region identifier of the mobile terminal is the region identifier of the region to which the mobile terminal's supplier belongs or the operator version information of the mobile terminal.

5. The method according to claim 1, characterized in that: The mobile terminal is installed with a user identification SIM card; the application processor obtains the area identification of the mobile terminal, including: The application processor reads the area identifier of the area to which the SIM card belongs; The area identifier of the mobile terminal is the area identifier of the area to which the SIM card belongs.

6. The method according to any one of claims 1 to 5, characterized in that A SIM card is installed in the mobile terminal; the first preset configuration file also includes a specific absorption rate (SAR) level corresponding to each area identifier; Before the modem selects the minimum limited transmit power from the transmit power set as the maximum transmit power of the mobile terminal, the method further includes: The application processor obtains the area identifier of the area to which the SIM card belongs; wherein the area identifier of the area to which the SIM card belongs includes the MCC and / or PLMN to which the SIM card belongs; The application processor reads a target SAR gear position corresponding to the area identifier of the area to which the SIM card belongs from the first preset configuration file; The application processor sends the target SAR gear position to the modem; The modem receives and analyzes the target SAR gear position to obtain a third limited transmit power; The transmit power set also includes the third limited transmit power.

7. The method according to any one of claims 1 to 6, characterized in that The modem transmits at the maximum transmit power, comprising: The modem transmits a preset signal at the maximum transmission power; wherein the preset signal includes at least one of the following: a signal of a physical random access channel of the mobile terminal, a signal of a physical uplink control channel, a signal of a physical uplink shared channel, and a channel sounding reference signal.

8. A method for limiting transmission power, characterized in that: The method is applied to a mobile terminal, the mobile terminal comprising an application processor and a modem, the application processor being coupled to the modem; The modem stores a second preset configuration file, wherein the second preset configuration file includes a plurality of area identifiers and a limited transmission power corresponding to each area identifier; the method includes: After the mobile terminal is powered on, the modem obtains from the base station a fourth limited transmission power of the network for the mobile terminal; The modem acquires a region identifier of the mobile terminal; The modem reads a fifth limited transmission power corresponding to the area identifier of the mobile terminal from the second preset configuration file; The modem uses the minimum limited transmission power in the transmission power set as the maximum transmission power of the mobile terminal. Large transmit power; wherein the transmit power set includes the fourth limited transmit power and the fifth limited transmit power; The modem transmits at the maximum transmit power.

9. The method according to claim 8, characterized in that The modem acquires the mobile terminal The regional identifier includes: The modem searches for a network and obtains an area identifier of an area to which the network belongs; wherein the area identifier of the mobile terminal is an area identifier of an area to which the network belongs.

10. The method according to claim 8, characterized in that The method further comprises: The application processor reads the system software identifier of the mobile terminal after the mobile terminal is turned on; The application processor sends the system software identifier of the mobile terminal to the modem; The modem acquiring the area identifier of the mobile terminal includes: The modem receives the system software identifier of the mobile terminal from the application processor; wherein the system software identifier is used to indicate the region to which the supplier of the mobile terminal belongs or the operator version information of the mobile terminal; the region identifier of the mobile terminal is the identifier of the region to which the supplier of the mobile terminal belongs Or the operator version information of the mobile terminal.

11. A method for limiting transmission power, characterized in that: The method is applied to a mobile terminal, the mobile The terminal includes an application processor and a modem, the application processor is coupled to the modem, and a SIM card is installed in the mobile terminal; a third preset configuration file is stored in the application processor, and the third preset configuration file includes a SAR gear corresponding to each area identifier; the method includes: After the mobile terminal is powered on, the application processor obtains the area identifier of the area to which the SIM card belongs; wherein the area identifier of the area to which the SIM card belongs includes the MCC and / or PLMN to which the SIM card belongs; The application processor reads a target SAR gear position corresponding to the area identifier of the area to which the SIM card belongs from a third preset configuration file; The application processor sends the target SAR gear position to the modem; The modem receives and analyzes the target SAR gear to obtain a sixth limited transmit power; The modem obtains, from the base station, a seventh limited transmission power of the network for the mobile terminal; The modem uses the minimum limited transmission power in the transmission power set as the maximum transmission power of the mobile terminal. Large transmit power; wherein the transmit power set includes the sixth limited transmit power and the seventh limited transmit power; The modem transmits at the maximum transmit power.

12. A mobile terminal, characterized in that: The invention comprises a processor and a memory, wherein the processor comprises an application processor and a modem; the application processor is coupled to the modem; The memory is coupled to the processor, and the memory is used to store computer program codes, wherein the computer program codes include computer instructions. When the processor executes the computer instructions, the mobile terminal executes the method according to any one of claims 1 to 11.

13. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed in the mobile terminal, the mobile terminal executes the method according to any one of claims 1 to 11.

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