CN111106846A

CN111106846A - Method, system and mobile terminal for reducing SAR value

Info

Publication number: CN111106846A
Application number: CN201911355803.8A
Authority: CN
Inventors: 陈卫; 白松; 张攀
Original assignee: Huizhou TCL Mobile Communication Co Ltd
Current assignee: Huizhou TCL Mobile Communication Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-05-05
Also published as: WO2021128556A1

Abstract

The embodiment of the invention discloses a method, a system and a mobile terminal for reducing SAR value. The embodiment of the invention comprises the following steps: detecting the working state of the mobile terminal, and adjusting the switching state of WIFI according to the working state; the mobile terminal is in a data communication state, and WIFI is started; and the mobile terminal is in a conversation state, and the WIFI is closed. According to the scheme, the high-power scene used by the cellular network and the WIFI use scene are staggered, only one module is ensured to possibly work at the maximum power at any moment, the main SAR comes from one module, and the condition that the sum of SAR values is too high or exceeds the standard when the two modules work simultaneously is avoided.

Description

Method, system and mobile terminal for reducing SAR value

Technical Field

The invention relates to the field of mobile terminals, in particular to a method and a system for reducing an SAR value and a mobile terminal.

Background

For an electronic product supporting cellular technology and WIFI (wireless fidelity), because there may be a case where cellular and WIFI are transmitted simultaneously, a total SAR value at the time of maximum power transmission of cellular and WIFI may be tested when CE (unified security qualification in europe) SAR (specific absorption Ratio) is certified, because the lower the SAR is, the better the sum of the SAR values of two modules is, the higher the SAR value of a single module is, which causes design difficulty. The SAR value of the product exceeds the standard, namely the product is not allowed to be sold in European regions, the governments of various countries in Europe can randomly select models in the market for spot check every year, if the SAR value of the product exceeds the standard, the product is called back comprehensively, and high fine is paid to manufacturers, so that the SAR value of the product in EU/APAC regions must meet the requirements of regulations.

When the mobile phone calls, sends short messages and surfs the internet through data, the cellular antenna used for the cellular network can generate radiation, when WIFI is used for surfing the internet, the WIFI antenna of the mobile phone can also generate radiation, and the final SAR value of the mobile phone is the sum of the two values. CE does not have mandatory requirements for simultaneous working of cellular and WIFI, and the sum of SAR values of two modules working simultaneously is possibly too high or exceeds the standard.

Disclosure of Invention

The embodiment of the invention provides a method, a system and a mobile terminal for reducing an SAR value, which stagger a cellular high-power scene and a WIFI use scene, and avoid overhigh or overproof sum of the SAR values when two modules work simultaneously.

The embodiment of the invention provides a method for reducing an SAR value, which comprises the following steps:

detecting the working state of the mobile terminal, and adjusting the switching state of WIFI according to the working state;

the mobile terminal is in a data communication state, and WIFI is started;

and the mobile terminal is in a conversation state, and the WIFI is closed.

Optionally, in some embodiments of the present invention, the enabling of the WIFI when the mobile terminal is in a data communication state includes:

detecting a WIFI state;

if the WIFI is normal, data transmission is carried out through the WIFI;

and if the WIFI is abnormal, carrying out data transmission through the cellular network.

Optionally, in some embodiments of the present invention, if the WIFI is normal, data transmission is performed through the WIFI, including:

the cellular network is in a standby state;

and the SAR value of the mobile terminal is the SAR value of the WIFI for data transmission.

Optionally, in some embodiments of the present invention, if the WIFI is not normal, the data transmission is performed through a cellular network, including:

starting the cellular network and opening data transmission;

and the SAR value of the mobile terminal is the SAR value of the cellular network for data transmission.

Optionally, in some embodiments of the present invention, the mobile terminal being in a call state and turning off WIFI includes:

starting the cellular network and opening voice communication;

the voice communication specifically comprises voice communication, VoLTE communication and VoIP communication;

the SAR value of the mobile terminal is the SAR value of the cellular network for voice communication.

and the mobile terminal finishes the voice communication and starts WIFI.

Correspondingly, an embodiment of the present invention provides a system for reducing an SAR value, including:

the detection unit is used for detecting the working state and the WIFI state of the mobile terminal;

the WIFI control unit is used for turning on and turning off the WIFI;

a cellular network control unit for starting a cellular network;

optionally, in some embodiments of the present invention, the detection unit includes:

the terminal detection module is used for detecting the working state of the mobile terminal;

and the WIFI detection module is used for detecting the WIFI state.

Optionally, in some embodiments of the present invention, the WIFI control unit includes:

the WIFI closing module is used for closing the WIFI when the mobile terminal is in a call state;

and the WIFI starting module is used for starting the WIFI for data transmission when the mobile terminal finishes voice communication, starts the WIFI and the mobile terminal is in a data communication state.

In addition, the embodiment of the invention also provides a mobile terminal, which comprises a processor and a processor, wherein the processor is suitable for realizing each instruction; and a memory adapted to store a plurality of instructions adapted to be loaded by the processor and to perform the steps of the method of reducing SAR values of any of the above.

According to the embodiment of the invention, the working state of the mobile terminal is detected, and the switching state of WIFI is adjusted according to the working state; the mobile terminal is in a data communication state, and WIFI is started; and the mobile terminal is in a conversation state, and the WIFI is closed. Therefore, the scheme avoids the situation that the sum of SAR values is too high or exceeds the standard when two modules work simultaneously by designing the high-power scene used by the cellular network and the WIFI scene to be staggered; only one module is ensured to possibly work at the maximum power at any moment, the main SAR comes from one module, and the sum of SAR values is ensured not to exceed the standard; meanwhile, the power consumption of the whole machine is reduced, the service time of a battery is prolonged, and the user experience is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic flow chart of a method for reducing an SAR value according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an apparatus for reducing an SAR value according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides a method for reducing an SAR value. The mobile terminal of the embodiment of the invention can be a mobile phone, a tablet computer, a notebook computer and other equipment.

The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.

A method of reducing SAR values, comprising: detecting the working state of the mobile terminal, and adjusting the switching state of WIFI according to the working state; the mobile terminal is in a data communication state, and WIFI is started; and the mobile terminal is in a conversation state, and the WIFI is closed.

As shown in fig. 1, the specific flow of the method may be as follows:

101. and detecting the working state of the mobile terminal, and adjusting the switching state of the WIFI according to the working state.

For example, the working state of the mobile terminal includes a data communication state and a call state, the transmission power of the mobile terminal in different working states is different, and the SAR value is also different; the higher the transmission power, the higher the SAR value, and when the transmission power is lower, the SAR value is correspondingly lower. Because the lower the SAR value in the using process of the mobile terminal, the better, in the embodiment of the invention, a software mechanism is designed to manage the SAR value of the mobile terminal in the working state, namely, the WIFI is turned on or off according to the working state of the mobile terminal by detecting the working state of the mobile terminal, so that the SAR value of the mobile terminal in the using state is reduced.

Wherein, SAR (specific absorption rate) refers to the electromagnetic radiation energy absorbed by a substance with unit mass in unit time, and the SAR value is generally used internationally to measure the thermal effect of terminal radiation, and each kilogram of electromagnetic radiation energy (watt) absorbed by human tissues is averaged in any 6 minutes; for example, the handset radiation is measured by the SAR value, which is the ratio of radiation absorbed by the soft tissues of the head, and the lower the SAR value, the less radiation is absorbed by the brain, wherein the SAR value for the brain region must be lower than 1.67 watts to be safe, but this does not indicate that the SAR level is directly related to the health of the user of the handset.

102. The mobile terminal is in a data communication state, and WIFI is started.

For example, the data communication state refers to a user browsing data, such as watching video, speaking voice, playing games, inquiring information, and the like. When the mobile terminal is in a data communication state, a user starts WIFI and a cellular network (cellular), then whether the WIFI connected with the mobile terminal is available is detected, if the WIFI is available, data transmission is preferentially carried out through the WIFI, and at the moment, the cellular network is in a standby state; and if the WIFI is unavailable, the user opens a data transmission module of the cellular network, and the mobile terminal performs data transmission through the cellular network.

The cellular network opens the data transmission module, but does not transmit data, namely the cellular network is in a standby state, the transmitting power is extremely low, the SAR value of the cellular network is also extremely low, at the moment, the SAR value of the mobile terminal mainly comes from a module of WIFI, the SAR value of the cellular network can be ignored, namely the SAR value of the mobile terminal is the SAR value of the WIFI for data transmission, and the SAR value of the mobile terminal cannot exceed the standard.

If the mobile terminal performs data transmission through the cellular network, data transmission is not performed because the WIFI is unavailable at the moment, the power of the WIFI is extremely low, the SAR value of the WIFI is negligible, the SAR value of the mobile terminal mainly comes from one module of the cellular network, namely the SAR value of the mobile terminal is the SAR value of the cellular network for data transmission, and the SAR value of the mobile terminal cannot exceed the standard.

Optionally, in some embodiments, the mobile terminal only starts the cellular network when performing the voice communication, and when the mobile terminal is in the data communication state, the data transmission module of the cellular network is always closed, the cellular network is in the standby state, at this time, the WIFI performs normal communication, and the SAR value of the mobile terminal is the SAR value for performing data transmission by the WIFI.

103. And the mobile terminal is in a conversation state, and the WIFI is closed.

For example, a cellular network of the mobile terminal is started, a voice communication module is started, when a user calls through the cellular network at the mobile terminal, WIFI communication is closed, and when the maximum power of the cellular network can be guaranteed to work, only one module of the cellular network has an SAR value, the SAR value of the mobile terminal is the SAR value of the cellular network for voice communication, and the SAR value of the mobile terminal cannot exceed the standard.

The Voice communication of the cellular network specifically includes Voice call, Voice over Long-term evolution (lte) call, Voice over Internet Protocol (VoIP) call; the voice call is a communication mode through voice and by means of a transmission medium, VoLTE is voice service based on IMS, VoIP can be used for a plurality of internet access devices including VoIP phones, smart phones and personal computers, and the call and the short message sending are carried out through a cellular network and Wi-Fi.

Because the power of the cellular network during voice communication is very high, the power consumption of the WIFI module can be saved by turning off the WIFI, so that the power consumption of the whole mobile terminal during the conversation period is reduced, and the service time of a mobile terminal battery is prolonged.

When the user performs voice communication through the cellular network, data browsing generally cannot be performed simultaneously, so that the user experience cannot be influenced by closing the WIFI. And after the user call is finished, the WIFI is restarted, the WIFI connection is recovered, and the user can continue to browse data through the WIFI.

In order to better implement the above method, an embodiment of the present invention may further provide an apparatus for reducing an SAR value, where the apparatus may be specifically integrated in a network device, and the network device may be a mobile terminal or the like.

For example, as shown in fig. 2, the apparatus may include a detection unit 201, a WIFI control unit 202, a cellular network control unit 203, as follows:

(1) detection unit 201

The detecting unit 201 is configured to detect an operating state and a WIFI state of the mobile terminal.

For example, the detection unit 201 includes a terminal detection module and a WIFI detection module; the terminal detection module detects the working state of the mobile terminal, wherein the working state of the mobile terminal comprises a data communication state and a call state; the WIFI detection module detects the state of the started WIFI, namely whether the WIFI connected with the mobile terminal is available or not.

(2) WIFI control unit 202

And the WIFI control unit 202 is used for turning on and off the WIFI.

For example, the WIFI control unit 202 includes a WIFI turning-off module and a WIFI turning-on module, where the WIFI turning-off module turns off WIFI when the mobile terminal is in a call state; the WIFI starting module is used for restarting WIFI after the mobile terminal finishes voice communication and starting the WIFI for data transmission when the mobile terminal is in a data communication state.

(3) Cellular network control unit 203

A cellular network control unit 203 for turning on the cellular network.

For example, when the mobile terminal is in a data communication state and WIFI is unavailable, the cellular network control unit 203 starts the cellular network for data transmission; when the mobile terminal is in a call state, starting a cellular network for voice communication; and when the mobile terminal is in a data communication state and the WIFI is available, enabling the cellular network to be in a standby state.

Optionally, in some embodiments, the apparatus for reducing an SAR value provided in the embodiments of the present invention further includes an SAR value calculating unit, configured to calculate an SAR value of the mobile terminal in a working process, that is, a sum of SAR values generated by a WIFI module and a cellular network module of the mobile terminal, compare the sum of the SAR values of the two modules with an SAR standard value, and control the sum of the SAR values of the two modules to be smaller than the SAR standard value.

When the mobile terminal is in a data communication state, the WIFI and the cellular network are started, whether the WIFI starting state is normal or not is detected, if the WIFI is available, the mobile terminal performs data transmission through the WIFI, the cellular network is in a standby state, the SAR value of the mobile terminal is calculated by the SAR value calculating unit at the moment, the power of the cellular network in the standby state is extremely low, the SAR value is extremely low, the sum of the SAR values of the two modules mainly comes from the SAR value of the WIFI for data transmission, and the sum of the SAR values of the two modules does not exceed the SAR standard value.

If the WIFI is unavailable, the mobile terminal transmits data through a cellular technology, the power of the WIFI is extremely low, the SAR value of the WIFI is also extremely low, the SAR value calculation unit calculates the SAR value of the mobile terminal at the moment, the sum of the SAR values of the two modules mainly comes from the SAR value of the cellular network for data transmission, and the sum of the SAR values of the two modules does not exceed the SAR standard value.

When the mobile terminal is in a call state, the WIFI is closed, the mobile terminal carries out voice communication through the cellular network, at the moment, the SAR value calculation unit calculates the SAR value of the mobile terminal, only one module of the cellular network has the SAR value, and the sum of the SAR values of the two modules does not exceed the SAR standard value.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method can be implemented in other ways. The above-described embodiments of apparatus for reducing SAR values are intended to be illustrative only, and the flowcharts and block diagrams in the figures, for example, illustrate the architecture, functionality, and operation of possible implementations of methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

Accordingly, as shown in fig. 3, the mobile terminal may include Radio Frequency (RF) circuit 301, a memory 302 including one or more computer-readable storage media, an input unit 303, a display unit 304, a sensor 305, an audio circuit 306, a wireless fidelity (WiFi) module 307, a processor 308 including one or more processing cores, and a power supply 309. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 3 is not intended to be limiting of mobile terminals and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components. Wherein:

the RF circuit 301 may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, for receiving downlink information from a base station and then processing the received downlink information by one or more processors 308; in addition, data relating to uplink is transmitted to the base station. In general, the RF circuit 301 includes, but is not limited to, an antenna, at least one Amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM) card, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuitry 301 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Message Service (SMS), and the like.

The memory 302 may be used to store software programs and modules, and the processor 308 executes various functional applications and data processing by operating the software programs and modules stored in the memory 302. The memory 302 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the mobile terminal, and the like. Further, the memory 302 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory 302 may also include a memory controller to provide the processor 308 and the input unit 303 access to the memory 302.

The input unit 303 may be used to receive input numeric or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, in one particular embodiment, the input unit 303 may include a touch-sensitive surface as well as other input devices. The touch-sensitive surface, also referred to as a touch display screen or a touch pad, may collect touch operations by a user (e.g., operations by a user on or near the touch-sensitive surface using a finger, a stylus, or any other suitable object or attachment) thereon or nearby, and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface may comprise two parts, a touch detection means and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 308, and can receive and execute commands sent by the processor 308. In addition, touch sensitive surfaces may be implemented using various types of resistive, capacitive, infrared, and surface acoustic waves. The input unit 303 may include other input devices in addition to the touch-sensitive surface. In particular, other input devices may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.

The display unit 304 may be used to display information input by or provided to the user and various graphical user interfaces of the mobile terminal, which may be made up of graphics, text, icons, video, and any combination thereof. The display unit 304 may include a display panel, and optionally, the display panel may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. Further, the touch-sensitive surface may overlay the display panel, and when a touch operation is detected on or near the touch-sensitive surface, the touch operation is transmitted to the processor 308 to determine the type of touch event, and the processor 308 then provides a corresponding visual output on the display panel according to the type of touch event. Although in FIG. 3 the touch-sensitive surface and the display panel are shown as two separate components to implement input and output functions, in some embodiments the touch-sensitive surface may be integrated with the display panel to implement input and output functions.

The mobile terminal may also include at least one sensor 305, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel according to the brightness of ambient light, and a proximity sensor that may turn off the display panel and/or the backlight when the mobile terminal is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile terminal, further description is omitted here.

Audio circuitry 306, a speaker, and a microphone may provide an audio interface between the user and the mobile terminal. The audio circuit 306 may transmit the electrical signal converted from the received audio data to a speaker, and convert the electrical signal into a sound signal for output; on the other hand, the microphone converts the collected sound signal into an electric signal, which is received by the audio circuit 306 and converted into audio data, which is then processed by the audio data output processor 308, and then transmitted to, for example, another mobile terminal via the RF circuit 301, or the audio data is output to the memory 302 for further processing. The audio circuitry 306 may also include an earbud jack to provide communication of a peripheral headset with the mobile terminal.

WiFi belongs to a short-distance wireless transmission technology, and the mobile terminal can help a user to send and receive e-mails, browse webpages, access streaming media and the like through the WiFi module 307, and provides wireless broadband internet access for the user. Although fig. 3 shows the WiFi module 307, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.

The processor 308 is a control center of the mobile terminal, connects various parts of the entire mobile phone using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 302 and calling data stored in the memory 302, thereby performing overall monitoring of the mobile phone. Optionally, processor 308 may include one or more processing cores; preferably, the processor 308 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 308.

The mobile terminal also includes a power supply 309 (e.g., a battery) for powering the various components, which may preferably be logically coupled to the processor 308 via a power management system that may be configured to manage charging, discharging, and power consumption. The power supply 309 may also include one or more dc or ac power sources, recharging systems, power failure detection circuitry, power converters or inverters, power status indicators, and any like components.

Although not shown, the mobile terminal may further include a camera, a bluetooth module, and the like, which will not be described herein. Specifically, in this embodiment, the processor 308 in the mobile terminal loads the executable file corresponding to the process of one or more application programs into the memory 302 according to the following instructions, and the processor 308 runs the application programs stored in the memory 302, thereby implementing various functions:

detecting the working state of the mobile terminal, and adjusting the switching state of WIFI according to the working state; the mobile terminal is in a data communication state, and WIFI is started; and the mobile terminal is in a conversation state, and the WIFI is closed.

The above operations can be implemented in the foregoing embodiments, and are not described in detail herein.

It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions or by associated hardware controlled by the instructions, which may be stored in a computer readable storage medium and loaded and executed by a processor. To this end, embodiments of the present invention provide a storage medium having stored therein a plurality of instructions, which can be loaded by a processor to perform the steps of any of the methods for reducing SAR values provided by embodiments of the present invention.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The method, the system and the mobile terminal for reducing the SAR value provided by the embodiment of the present invention are described in detail above, a specific example is applied in the present document to illustrate the principle and the implementation manner of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A method of reducing SAR values, comprising:

the mobile terminal is in a data communication state, and WIFI is started;

and the mobile terminal is in a conversation state, and the WIFI is closed.

2. The method of claim 1, wherein the mobile terminal is in a data communication state, and the WIFI is turned on, and the method comprises the following steps:

detecting a WIFI state;

if the WIFI is normal, data transmission is carried out through the WIFI;

3. The method of claim 2, wherein if the WIFI is normal, then performing data transmission via the WIFI includes:

the cellular network is in a standby state;

4. The method of claim 2, wherein the WIFI is not normal and the data transmission is performed through a cellular network, comprising:

starting the cellular network and opening data transmission;

5. The method of claim 1, wherein the mobile terminal is in a talk state, and the WIFI is turned off, and the method comprises the following steps:

starting the cellular network and opening voice communication;

6. The method of claim 5, wherein the mobile terminal is in a talk state, and the WIFI is turned off, and the method comprises the following steps:

and the mobile terminal finishes the voice communication and starts WIFI.

7. A system for reducing SAR values, comprising:

the WIFI control unit is used for turning on and turning off the WIFI;

and the cellular network control unit is used for starting the cellular network.

8. The system for reducing SAR values of claim 7, wherein the detection unit comprises:

and the WIFI detection module is used for detecting the WIFI state.

9. The system for reducing SAR values of claim 7, wherein the WIFI control unit comprises:

10. A mobile terminal comprising a processor adapted to implement instructions; and a memory adapted to store a plurality of instructions adapted to be loaded by the processor and to perform the steps of the method of reducing SAR values according to any one of the preceding claims 1 to 6.