CN111132288B - Method for reducing specific absorption rate and terminal equipment - Google Patents

Method for reducing specific absorption rate and terminal equipment Download PDF

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Publication number
CN111132288B
CN111132288B CN201911340011.3A CN201911340011A CN111132288B CN 111132288 B CN111132288 B CN 111132288B CN 201911340011 A CN201911340011 A CN 201911340011A CN 111132288 B CN111132288 B CN 111132288B
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gpio interface
level
microprocessor
level state
trigger signal
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CN111132288A (en
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周玉琼
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Wingtech Communication Co Ltd
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Wingtech Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0251—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The embodiment of the invention provides a method for reducing specific absorption rate and terminal equipment, and relates to the field of communication. The method comprises the following steps: when the SAR sensor judges that the sensed capacitance value reaches a preset trigger threshold, a corresponding interrupt trigger signal is sent to the microprocessor, the microprocessor sets the level state of the GPIO interface according to the interrupt trigger signal, the modem polls and reads the level state of the GPIO interface, and the corresponding transmitting power level is determined according to the first corresponding relation and the level state of the GPIO interface so as to reduce SAR of the terminal equipment according to the transmitting power level. Therefore, in the embodiment, when the capacitance value sensed by the SAR sensor reaches the preset trigger threshold, the terminal equipment main system is not required to be awakened, communication between the microprocessor and the modem can be realized only through the GPIO interface on the microprocessor, the code is simple, the logic is clear, and the power consumption problem in the SAR trigger process is greatly reduced.

Description

Method for reducing specific absorption rate and terminal equipment
Technical Field
The present invention relates to the field of communications, and in particular, to a method and a terminal device for reducing specific absorption rate.
Background
When the terminal device is used, radio waves are transmitted to the transmitting base station, and the radio waves cause certain radiation injury to human bodies, currently, the electromagnetic radiation energy absorbed by human tissues of unit mass is generally measured by using SAR (Specific Absorption Rate, electromagnetic wave absorption ratio or specific absorption rate) indexes.
With the development of the communication field, the requirements of terminal equipment manufacturers on SAR reduction are improved, and the standby SAR reduction scene is increased. However, when the SAR is reduced in the standby scenario, an additional power consumption burden is brought to the terminal device, because the human body frequently touches the terminal device when the terminal device is in standby, so that the SAR sensor continuously wakes up the main system of the terminal device, thereby achieving the purpose of reducing the SAR.
Therefore, how to achieve low power consumption and SAR reduction is a problem to be solved by those skilled in the art.
Disclosure of Invention
The object of the present invention consists, for example, in providing a method and a terminal device for reducing specific absorption rate, which enable a low power consumption SAR reduction with a simple and logically clear scheme.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment provides a method for reducing specific absorption rate, which is applied to a terminal device, where the terminal device includes a specific absorption rate SAR sensor, a microprocessor, and a modem, the SAR sensor is electrically connected to the microprocessor, the microprocessor is electrically connected to the modem, the microprocessor includes at least one general purpose input/output GPIO interface, and a first correspondence is pre-stored in the modem, and the first correspondence includes a correspondence between a level state of the GPIO interface and a transmit power level; the method comprises the following steps:
when the SAR sensor judges that the sensed capacitance value reaches a preset trigger threshold, a corresponding interrupt trigger signal is sent to the microprocessor;
the microprocessor sets the level state of the GPIO interface according to the interrupt trigger signal;
and the modem polls and reads the level state of the GPIO interface, and determines a corresponding transmitting power level according to the first corresponding relation and the level state of the GPIO interface so as to reduce SAR of the terminal equipment according to the transmitting power level.
In an alternative embodiment, the step of sending a corresponding interrupt trigger signal to the microprocessor when the SAR sensor determines that the sensed capacitance value reaches the preset trigger threshold includes:
when the capacitance value reaches a first trigger threshold, the SAR sensor sends a first interrupt trigger signal to the microprocessor; when the capacitance value reaches a second trigger threshold, a second interrupt trigger signal is sent to the microprocessor; wherein the first trigger threshold is less than the second trigger threshold.
In an alternative embodiment, the at least one general purpose input/output GPIO interface includes a first GPIO interface and a second GPIO interface, and the step of setting, by the microprocessor, a level state of the GPIO interface according to the interrupt trigger signal includes:
when the interrupt trigger signal is the first interrupt trigger signal, setting the level state of the first GPIO interface to be high level, and setting the level state of the second GPIO interface to be low level;
and when the interrupt trigger signal is the second interrupt trigger signal, setting the level state of the first GPIO interface to be low level, and setting the level state of the second GPIO interface to be high level.
In an alternative embodiment, the method further comprises:
and when the microprocessor acquires the abnormal trigger signal, setting the level state of the first GPIO interface to be low level, and setting the level state of the second GPIO interface to be low level.
In an optional implementation manner, the modem also pre-stores a second corresponding relationship, where the second corresponding relationship includes a level state of a GPIO interface, a corresponding relationship between a receiver state of the terminal device and a transmitting power level; the method further comprises the steps of:
the modem acquires the receiver state of the terminal equipment;
and the modem determines a corresponding transmitting power level according to the second corresponding relation, the receiver state of the terminal equipment and the level state of the GPIO interface.
In a second aspect, an embodiment provides a terminal device, including a specific absorption rate SAR sensor, a microprocessor, and a modem, where the SAR sensor is electrically connected to the microprocessor, the microprocessor is electrically connected to the modem, the microprocessor includes at least one general purpose input/output GPIO interface, and a first correspondence is pre-stored in the modem, and the first correspondence includes a correspondence between a level state of the GPIO interface and a transmission power level;
the SAR sensor is used for sending a corresponding interrupt trigger signal to the microprocessor when judging that the sensed capacitance value reaches a preset trigger threshold;
the microprocessor is used for setting the level state of the GPIO interface according to the interrupt trigger signal;
the modem is used for polling and reading the level state of the GPIO interface, and determining the corresponding transmitting power level according to the first corresponding relation and the level state of the GPIO interface so as to reduce SAR of the terminal equipment according to the transmitting power level.
In an alternative embodiment, the SAR sensor is configured to send a first interrupt trigger signal to the microprocessor when the capacitance value reaches a first trigger threshold; when the capacitance value reaches a second trigger threshold, a second interrupt trigger signal is sent to the microprocessor; wherein the first trigger threshold is less than the second trigger threshold.
In an alternative embodiment, the at least one general purpose input output GPIO interface comprises a first GPIO interface and a second GPIO interface;
the microprocessor is used for setting the level state of the first GPIO interface to be high level and the level state of the second GPIO interface to be low level when the interrupt trigger signal is the first interrupt trigger signal; and when the interrupt trigger signal is the second interrupt trigger signal, setting the level state of the first GPIO interface to be low level, and setting the level state of the second GPIO interface to be high level.
In an optional embodiment, the microprocessor is further configured to set a level state of the first GPIO interface to a low level and a level state of the second GPIO interface to a low level when the abnormal trigger signal is acquired.
In an optional implementation manner, the modem also pre-stores a second corresponding relationship, where the second corresponding relationship includes a level state of a GPIO interface, a corresponding relationship between a receiver state of the terminal device and a transmitting power level;
the modem is further configured to obtain a receiver state of the terminal device, and determine a corresponding transmit power level according to the second correspondence, the receiver state of the terminal device, and the level state of the GPIO interface.
The beneficial effects of the embodiment of the invention include, for example: in the method and the terminal device for reducing the specific absorption rate provided by the embodiments of the present invention, the terminal device includes a SAR sensor, a microprocessor and a modem, the SAR sensor is electrically connected with the microprocessor, the microprocessor is electrically connected with the modem, the microprocessor includes at least one GPIO interface, a first correspondence is pre-stored in the modem, the first correspondence includes a correspondence between a level state of the GPIO interface and a transmission power level, when the SAR sensor determines that the sensed capacitance value reaches a preset trigger threshold, a corresponding interrupt trigger signal is sent to the microprocessor, the microprocessor sets the level state of the GPIO interface according to the interrupt trigger signal, the modem polls and reads the level state of the GPIO interface, and determines the corresponding transmission power level according to the first correspondence and the level state of the GPIO interface, so as to reduce the SAR of the terminal device according to the transmission power level. Therefore, in the embodiment, when the capacitance value sensed by the SAR sensor reaches the preset trigger threshold, the terminal equipment main system is not required to be awakened, communication between the microprocessor and the modem can be realized only through the GPIO interface on the microprocessor, the code is simple, the logic is clear, and the power consumption problem in the SAR trigger process is greatly reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of a terminal device according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for reducing specific absorption rate according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a method for reducing specific absorption rate according to an embodiment of the present invention.
Icon: 100-terminal equipment; a 110-SAR sensor; 120-a microprocessor; 130-modem.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1, a block diagram of a terminal device 100 according to an embodiment of the present invention is shown. The terminal device 100 includes a SAR sensor 110, a microprocessor 120 and a modem 130, the SAR sensor 110 is electrically connected to the microprocessor 120, the microprocessor 120 is electrically connected to the modem 130, the microprocessor 120 includes at least one GPIO (General Purpose Input Output ) interface, and a first correspondence is pre-stored in the modem 130, and the first correspondence includes a correspondence between a level state of the GPIO interface and a transmit power level (Device State Index, DSI).
Alternatively, the terminal device 100 may be a mobile phone, a notebook computer, a tablet, an intelligent wearable device, or the like.
The SAR sensor 110 is configured to send a corresponding interrupt trigger signal to the microprocessor 120 when it is determined that the sensed capacitance value reaches a preset trigger threshold.
In the present embodiment, the SAR SENSOR 110, which may also be called SAR SENSOR, measures the distance between the human body and the terminal device 100 by sensing a change in capacitance value. The SAR sensor 110 is configured to send a first interrupt trigger signal to the microprocessor 120 when the capacitance value reaches a first trigger threshold; when the capacitance value reaches a second trigger threshold, a second interrupt trigger signal is sent to the microprocessor 120; wherein the first trigger threshold is less than the second trigger threshold.
It will be appreciated that the SAR sensor 110 is triggered by an interrupt, i.e., when it is determined that the sensed capacitance value reaches a corresponding trigger threshold (also referred to as a trigger SAR event), a bit (bit) of a register on the microprocessor 120 can be manipulated so that the microprocessor 120 can determine whether a SAR event has triggered based on the value of the bit, and then perform a corresponding processing operation. In this manner, when the terminal device 100 is in the standby state, the microprocessor 120 does not need to use the polling operation mode (using the polling operation mode, the microprocessor 120 cannot sleep) to determine whether there is a SAR event trigger, so the microprocessor 120 can sleep when there is no SAR event trigger.
For example, a first trigger threshold is set as A, a second trigger threshold is set as B, and A < B; when the capacitance value sensed by the SAR sensor 110 reaches the first trigger threshold a, a "1" can be written to bit1 of a register on the microprocessor 120 (first interrupt trigger signal); when the capacitance value sensed by the SAR sensor 110 reaches the first trigger threshold B, "1" may be written to bit2 of the register on the microprocessor 120 (second interrupt trigger signal); the microprocessor 120 can determine whether there is an interrupt trigger according to whether the value of bit1 or bit2 of the register is "1".
It should be noted that, the first trigger threshold a and the second trigger threshold B may be determined according to a requirement of a user for a trigger distance. For example, the triggering distance corresponding to the first triggering threshold A is 20mm, and the triggering distance corresponding to the second triggering threshold B is 5mm; when the capacitance value sensed by the SAR sensor 110 reaches the first trigger threshold a, the trigger level of the current SAR event is considered to be a first-level trigger (i.e., long-distance trigger, SAR is reduced at 20mm from the terminal device 100); when the capacitance value sensed by the SAR sensor 110 reaches the second trigger threshold B, the trigger level of the current SAR event is considered to be a secondary trigger (i.e., a close range trigger, a decrease SAR at 5mm from the terminal device 100).
In this embodiment, in order to avoid that the SAR sensor 110 wakes up the main system of the terminal device 100 when determining that the sensed capacitance value reaches the corresponding trigger threshold, the SAR sensor 110 needs to register with the frame layer of the operating system of the terminal device 100, and the registration type is no-wakeup SAR sensor (a SAR type that cannot wake up the system when the device system goes to sleep), and the frame layer may perform an opening and listening operation on the SAR sensor 110.
The microprocessor 120 is configured to set a level state of the GPIO interface according to the interrupt trigger signal.
In this embodiment, the microprocessor 120, which may also be referred to as a sensor hub, is a low-power processing chip for connecting the SAR sensor 110 and processing data transmitted by the SAR sensor 110. When the microprocessor 120 acquires the interrupt trigger signal, it may determine that there is a SAR event trigger, and a level state of the GPIO interface needs to be set.
Optionally, the at least one GPIO interface includes a first GPIO interface and a second GPIO interface, where the microprocessor 120 is configured to set a level state of the first GPIO interface to a high level and a level state of the second GPIO interface to a low level when the interrupt trigger signal is the first interrupt trigger signal; when the interrupt trigger signal is a second interrupt trigger signal, the level state of the first GPIO interface is set to be low, and the level state of the second GPIO interface is set to be high.
For example, when the microprocessor 120 determines that the bit1 value of the register is "1", it determines that the trigger level of the current SAR event is a first level trigger, sets the level state of the first GPIO interface to be a high level, and sets the level state of the second GPIO interface to be a low level; when the microprocessor 120 judges that the bit2 bit value of the register is "1", determining that the trigger level of the current SAR event is a secondary trigger, setting the level state of the first GPIO interface to be a low level, and setting the level state of the second GPIO interface to be a high level; when the human body is far away from the terminal device 100, the level states of the first GPIO interface and the second GPIO interface are both default to high level.
The modem 130 is configured to poll and read the level state of the GPIO interface, determine a corresponding transmit power level according to the first correspondence and the level state of the GPIO interface, and reduce SAR of the terminal device 100 according to the transmit power level.
In this embodiment, the modem 130 may be configured to start a timer, and is configured to read the level state of the GPIO interface in the microprocessor 120 in real time, and determine whether the human body is far away from the terminal device 100, in a first-order approach state, or in a second-order approach state according to the level state of the GPIO interface. For example, when the level states of the first GPIO interface and the second GPIO interface are both high, then the current state is considered to be a far-away state; when the level state of the first GPIO interface is read to be high level and the level state of the second GPIO interface is read to be low level, the current state is considered to be a first-level approaching state; and when the level state of the first GPIO interface is read to be low level and the level state of the second GPIO interface is read to be high level, the second GPIO interface is considered to be a second-level approaching state.
Assuming that in the first corresponding relation, when the level states of the first GPIO interface and the second GPIO interface are both high levels, the corresponding transmitting power level is DSI1; the level state of the first GPIO interface is high level, and when the level state of the second GPIO interface is low level, the corresponding transmitting power class is DSI2; the level state of the first GPIO interface is low level, and when the level state of the second GPIO interface is high level, the corresponding transmitting power level is DSI3; after the modem 130 reads the level states of the GPIO interfaces, the corresponding transmit power levels can be determined according to the first correspondence and the level states of the first GPIO interface and the second GPIO interface, and the antenna transmit power of the terminal device 100 is reduced based on the determined transmit power levels, so as to achieve the purpose of reducing the SAR of the terminal device 100.
Optionally, the microprocessor 120 is further configured to set the level state of the first GPIO interface to be low and the level state of the second GPIO interface to be low when the abnormal trigger signal is acquired.
In this embodiment, the microprocessor 120 may determine whether there is interrupt trigger according to the bit1/bit2 value of the register, but when other bits (bits except bit1 and bit 2) on the register are triggered by mistake, the microprocessor 120 will determine that abnormal trigger occurs and set the level state of the GPIO interface.
Assuming that in the first correspondence, when the level states of the first GPIO interface and the second GPIO interface are both low, the corresponding transmit power level is DSI4, and when the modem 130 reads that the level states of the first GPIO interface and the second GPIO interface are both low, it may be determined that the corresponding transmit power level is DSI4.
In practical applications, the modem 130 may also determine the corresponding transmit power level by acquiring the earpiece state of the terminal device 100 and combining the earpiece state of the terminal device 100 with the level state of the GPIO interface.
Optionally, the modem 130 further pre-stores a second correspondence relationship, where the second correspondence relationship includes a level state of the GPIO interface, a receiver state of the terminal device 100, and a transmission power level. Wherein the earpiece state of the terminal device 100 includes an open state and a closed state.
The modem 130 is further configured to obtain a receiver status of the terminal device 100, and determine a corresponding transmit power level according to the second correspondence, the receiver status of the terminal device 100, and the level status of the GPIO interface.
The receiver status of the terminal device 100 may be detected by the frame layer, and when the frame layer detects that the receiver status changes, the changed receiver status is sent to the modem 130, and the modem 130 determines the corresponding transmit power level according to the second correspondence, the receiver status of the terminal device 100, and the level status of the GPIO interface.
It should be noted that, in the terminal device 100 provided in this embodiment, the number of GPIO interfaces may be set according to the trigger level requirement of the SAR event, so as to be suitable for one-stage or even multi-stage triggering, and therefore, the setting number of GPIO interfaces is not limited in this embodiment.
It can be seen that, in the terminal device 100 provided in the embodiment of the present invention, when the SAR event is triggered, communication between the microprocessor 120 and the modem 130 can be implemented only by using the GPIO interface with empty hardware, without waking up the main system of the terminal device 100, the code is simple, the logic is clear, and the power consumption problem in the SAR triggering process is greatly reduced.
Fig. 2 is a schematic flow chart of a method for reducing specific absorption rate according to an embodiment of the invention. It should be noted that the specific absorption rate reducing method provided in this embodiment is not limited to the specific order shown in fig. 2 and described below, and the basic principle and technical effects thereof are the same as those of the foregoing embodiment, and for brevity, reference may be made to the corresponding parts of the foregoing embodiment. It should be understood that, in other embodiments, the method for reducing specific absorption rate according to the present embodiment may have part of the steps interchanged according to actual needs, or part of the steps omitted or deleted. The specific absorption rate reducing method is applied to the terminal device 100 described above, and a specific flow of the specific absorption rate reducing method will be described in detail with reference to fig. 2.
Step S201, when the SAR sensor judges that the sensed capacitance value reaches a preset trigger threshold, a corresponding interrupt trigger signal is sent to the microprocessor.
In this embodiment, the SAR sensor 110 sends a first interrupt trigger signal to the microprocessor 120 when the capacitance value reaches a first trigger threshold; when the capacitance value reaches a second trigger threshold, a second interrupt trigger signal is sent to the microprocessor 120; wherein the first trigger threshold is less than the second trigger threshold.
In step S202, the microprocessor sets the level state of the GPIO interface according to the interrupt trigger signal.
In this embodiment, the at least one GPIO interface includes a first GPIO interface and a second GPIO interface, where when the interrupt trigger signal is a first interrupt trigger signal, the level state of the first GPIO interface is set to be a high level, and the level state of the second GPIO interface is set to be a low level; when the interrupt trigger signal is a second interrupt trigger signal, the level state of the first GPIO interface is set to be low, and the level state of the second GPIO interface is set to be high.
Optionally, when the microprocessor 120 acquires the abnormal trigger signal, the level state of the first GPIO interface is set to a low level, and the level state of the second GPIO interface is set to a low level.
In step S203, the modem polls and reads the level state of the GPIO interface.
In step S204, the modem determines a corresponding transmit power level according to the first correspondence and the level state of the GPIO interface, so as to reduce SAR of the terminal device according to the transmit power level.
Optionally, the modem 130 further pre-stores a second correspondence, where the second correspondence includes a level state of the GPIO interface, a correspondence between a receiver state of the terminal device 100 and a transmit power level, and the modem 130 may further combine the receiver state of the terminal device 100 and the level state of the GPIO interface to determine a corresponding transmit power level. Referring to fig. 3, another flow chart of a method for reducing specific absorption rate according to an embodiment of the present invention is shown, where the method further includes:
in step S301, the modem acquires the earpiece state of the terminal device.
In step S302, the modem determines a corresponding transmit power level according to the second correspondence, the earpiece state of the terminal device, and the level state of the GPIO interface.
In summary, the embodiment of the invention provides a method and terminal equipment for reducing specific absorption rate, the terminal equipment comprises a SAR sensor, a microprocessor and a modem, the SAR sensor is electrically connected with the microprocessor, the microprocessor is electrically connected with the modem, the microprocessor comprises at least one GPIO interface, a first corresponding relation is prestored in the modem, the first corresponding relation comprises a corresponding relation between the level state of the GPIO interface and the transmitting power level, when the SAR sensor judges that the sensed capacitance value reaches a preset trigger threshold, a corresponding interrupt trigger signal is sent to the microprocessor, the microprocessor sets the level state of the GPIO interface according to the interrupt trigger signal, the modem polls and reads the level state of the GPIO interface, and the corresponding transmitting power level is determined according to the first corresponding relation and the level state of the GPIO interface, so that SAR of the terminal equipment is reduced according to the transmitting power level. Therefore, in the embodiment, when the capacitance value sensed by the SAR sensor reaches the preset trigger threshold, the terminal equipment main system is not required to be awakened, communication between the microprocessor and the modem can be realized only through the GPIO interface on the microprocessor, the code is simple, the logic is clear, and the power consumption problem in the SAR trigger process is greatly reduced.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The method for reducing the specific absorption rate is applied to terminal equipment and is characterized in that the terminal equipment comprises a specific absorption rate SAR sensor, a microprocessor and a modem, wherein the SAR sensor is electrically connected with the microprocessor, the microprocessor is electrically connected with the modem, the microprocessor comprises at least one general purpose input/output (GPIO) interface, a first corresponding relation is prestored in the modem, and the first corresponding relation comprises a corresponding relation between the level state of the GPIO interface and the transmission power level; the number of the GPIO interfaces is set according to the trigger level requirement of the SAR event; setting trigger thresholds according to the trigger distance on the SAR sensor, wherein different trigger thresholds correspond to SAR events with different trigger levels; the method comprises the following steps:
when the SAR sensor judges that the sensed capacitance value reaches a corresponding trigger threshold, a corresponding interrupt trigger signal is sent to the microprocessor;
the microprocessor sets the level state of the GPIO interface according to the interrupt trigger signal;
and the modem polls and reads the level state of the GPIO interface, and determines a corresponding transmitting power level according to the first corresponding relation and the level state of the GPIO interface so as to reduce SAR of the terminal equipment according to the transmitting power level.
2. The method of claim 1, wherein the step of sending a corresponding interrupt trigger signal to the microprocessor when the SAR sensor determines that the sensed capacitance value reaches the corresponding trigger threshold comprises:
when the capacitance value reaches a first trigger threshold, the SAR sensor sends a first interrupt trigger signal to the microprocessor; when the capacitance value reaches a second trigger threshold, a second interrupt trigger signal is sent to the microprocessor; wherein the first trigger threshold is less than the second trigger threshold.
3. The method of claim 2, wherein the at least one general purpose input/output GPIO interface comprises a first GPIO interface and a second GPIO interface, and wherein the step of the microprocessor setting the level state of the GPIO interface based on the interrupt trigger signal comprises:
when the interrupt trigger signal is the first interrupt trigger signal, setting the level state of the first GPIO interface to be high level, and setting the level state of the second GPIO interface to be low level;
and when the interrupt trigger signal is the second interrupt trigger signal, setting the level state of the first GPIO interface to be low level, and setting the level state of the second GPIO interface to be high level.
4. A method according to claim 3, characterized in that the method further comprises:
and when the microprocessor acquires the abnormal trigger signal, setting the level state of the first GPIO interface to be low level, and setting the level state of the second GPIO interface to be low level.
5. The method of claim 1, wherein the modem further pre-stores a second correspondence, the second correspondence including a correspondence between a level state of a GPIO interface, a handset state of the terminal device, and a transmit power level; the method further comprises the steps of:
the modem acquires the receiver state of the terminal equipment;
and the modem determines a corresponding transmitting power level according to the second corresponding relation, the receiver state of the terminal equipment and the level state of the GPIO interface.
6. The terminal equipment is characterized by comprising a specific absorption rate SAR sensor, a microprocessor and a modem, wherein the SAR sensor is electrically connected with the microprocessor, the microprocessor is electrically connected with the modem, the microprocessor comprises at least one general purpose input/output (GPIO) interface, a first corresponding relation is prestored in the modem, and the first corresponding relation comprises a corresponding relation between the level state of the GPIO interface and the transmission power level; the number of the GPIO interfaces is set according to the trigger level requirement of the SAR event; setting trigger thresholds according to the trigger distance on the SAR sensor, wherein different trigger thresholds correspond to SAR events with different trigger levels;
the SAR sensor is used for sending a corresponding interrupt trigger signal to the microprocessor when judging that the sensed capacitance value reaches a corresponding trigger threshold;
the microprocessor is used for setting the level state of the GPIO interface according to the interrupt trigger signal;
the modem is used for polling and reading the level state of the GPIO interface, and determining the corresponding transmitting power level according to the first corresponding relation and the level state of the GPIO interface so as to reduce SAR of the terminal equipment according to the transmitting power level.
7. The terminal device of claim 6, wherein the SAR sensor is configured to send a first interrupt trigger signal to the microprocessor when the capacitance value reaches a first trigger threshold; when the capacitance value reaches a second trigger threshold, a second interrupt trigger signal is sent to the microprocessor; wherein the first trigger threshold is less than the second trigger threshold.
8. The terminal device of claim 7, wherein the at least one general purpose input output GPIO interface comprises a first GPIO interface and a second GPIO interface;
the microprocessor is used for setting the level state of the first GPIO interface to be high level and the level state of the second GPIO interface to be low level when the interrupt trigger signal is the first interrupt trigger signal; and when the interrupt trigger signal is the second interrupt trigger signal, setting the level state of the first GPIO interface to be low level, and setting the level state of the second GPIO interface to be high level.
9. The terminal device of claim 8, wherein the microprocessor is further configured to set the level state of the first GPIO interface to a low level and the level state of the second GPIO interface to a low level when the abnormal trigger signal is acquired.
10. The terminal device of claim 6, wherein the modem further pre-stores a second correspondence, the second correspondence including a level state of a GPIO interface, a correspondence between a handset state of the terminal device and a transmit power level;
the modem is further configured to obtain a receiver state of the terminal device, and determine a corresponding transmit power level according to the second correspondence, the receiver state of the terminal device, and the level state of the GPIO interface.
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