WO2023024820A1 - Method and apparatus for adjusting specific absorption rate of electromagnetic wave, medium, and electronic device - Google Patents

Abstract

A method for adjusting the specific absorption rate (SAR) of an electromagnetic wave, an apparatus for adjusting the SAR of an electromagnetic wave, a computer-readable medium, and an electronic device, which relate to the technical field of radiation adjustment. The method comprises: determining, according to a preset SAR threshold corresponding to an area in which a terminal device is located, a target mapping corresponding to the area (S310); reading the current target transmit power of the terminal device, and determining, on the basis of the target mapping, a target antenna state corresponding to the target transmit power (S320); and adjusting an antenna switch of the terminal device, so that an antenna of the terminal device is in a target antenna state, so as to adjust the electromagnetic wave SAR corresponding to the terminal device (S330). In the method, a switch device like an antenna switch is used for both tuning the antenna performance and for dynamically switching antenna states according to a current target transmit power, so as to achieve the purpose of adjusting an SAR value without reducing the radio frequency output power.

Description

Method and device for adjusting electromagnetic wave specific absorption rate, medium and electronic equipment

Cross References to Related Applications

This application claims the priority of the Chinese patent application with the application number 202110983990.5 and titled "Method and device, medium and electronic equipment for adjusting the specific absorption rate of electromagnetic waves" filed on August 25, 2021. The entire content of the Chinese patent application Incorporated herein by reference in its entirety.

technical field

The disclosure relates to the technical field of radiation adjustment, and in particular to a method for adjusting the specific absorption rate of electromagnetic waves, a device for adjusting the specific absorption rate of electromagnetic waves, a computer-readable medium, and electronic equipment.

Background technique

In order to protect human health and safety, mobile terminals at home and abroad need to meet the electromagnetic wave specific absorption rate (Specific Absorption Rate, SAR) compliance requirements. In related technologies, for mobile terminals such as mobile phones, if the measured SAR value is greater than the preset SAR threshold of the safety standard stipulated by the region, it is usually processed in the following two ways: one is to adjust the matching topology of the antenna to change the hotspot of the antenna The distribution or antenna radiation performance, so as to achieve the purpose of reducing the SAR value; the second is to identify various application scenarios through hotspots or some sensors, and then reduce the RF output power according to different application scenarios, so that the SAR value of the antenna is lower than the specified safety standard.

However, although the above-mentioned first method can essentially solve the problem of SAR value exceeding the standard, it will affect the performance of the antenna in all application scenarios, so it may lead to the situation that the basic functions of the antenna cannot be realized in specific scenarios; the second method Although the method can directly and effectively reduce the SAR value, it is difficult to balance and cover complex application scenarios considering the size, cost, effective conditions of hotspots or sensors, and the complexity of SAR value testing of mobile devices. A method to passively reduce the SAR value.

Contents of the invention

According to the first aspect of the present disclosure, there is provided a method for adjusting the specific absorption rate of electromagnetic waves, including: determining the target mapping relationship corresponding to the region according to the preset SAR threshold corresponding to the region where the terminal device is located; wherein the target mapping relationship includes transmit power and antenna The mapping relationship between states; read the current target transmission power of the terminal device, and determine the target antenna state corresponding to the target transmission power based on the target mapping relationship; adjust the antenna switch of the terminal device so that the antenna of the terminal device is in the target antenna state , to adjust the electromagnetic wave specific absorption rate corresponding to the terminal equipment.

According to the second aspect of the present disclosure, there is provided an apparatus for adjusting the specific absorption rate of electromagnetic waves, including: a mapping determination module configured to determine the target mapping relationship corresponding to the region according to the preset SAR threshold corresponding to the region where the terminal device is located; wherein, the target The mapping relationship includes a mapping relationship between transmission power and antenna state; the target determination module is configured to read the current target transmission power of the terminal device, and determine the target antenna state corresponding to the target transmission power based on the target mapping relationship; the state adjustment module, It is configured to adjust the antenna switch of the terminal device, so that the antenna of the terminal device is in a target antenna state, so as to adjust the electromagnetic wave specific absorption rate corresponding to the terminal device.

According to a third aspect of the present disclosure, there is provided a computer-readable medium on which a computer program is stored, and when the computer program is executed by a processor, the above method is implemented.

According to a fourth aspect of the present disclosure, there is provided an electronic device, including: a processor; and a memory configured to store one or more programs, so that when the one or more programs are executed by the one or more processors, a or a plurality of processors to implement the method described above.

Description of drawings

FIG. 1 shows a schematic diagram of an exemplary system architecture to which embodiments of the present disclosure can be applied;

FIG. 2 shows a schematic diagram of an electronic device to which an embodiment of the present disclosure can be applied;

FIG. 3 schematically shows a flow chart of a method for adjusting the specific absorption rate of electromagnetic waves in an exemplary embodiment of the present disclosure;

FIG. 4 schematically shows a flowchart of a method for determining a target mapping relationship in an exemplary embodiment of the present disclosure;

FIG. 5 schematically shows a flowchart of a method for generating a target mapping relationship in an exemplary embodiment of the present disclosure;

FIG. 6 schematically shows a schematic diagram of a process of establishing K transmit power ranges in an exemplary embodiment of the present disclosure;

Fig. 7 schematically shows a comparative diagram of beneficial effects brought by exemplary embodiments of the present disclosure;

Fig. 8 schematically shows the composition of the device for adjusting the specific absorption rate of electromagnetic waves in an exemplary embodiment of the present disclosure.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different network and/or processor means and/or microcontroller means.

Fig. 1 shows a schematic diagram of a system architecture of an exemplary application environment in which a method and device for adjusting electromagnetic wave specific absorption rate according to an embodiment of the present disclosure can be applied.

As shown in FIG. 1 , the system architecture 100 may include one or more of terminal devices 101 , 102 , 103 , a network 104 and a server 105 . The network 104 is used as a medium for providing communication links between the terminal devices 101 , 102 , 103 and the server 105 . Network 104 may include various connection types, such as wires, wireless communication links, or fiber optic cables, among others. The terminal devices 101, 102, and 103 may be electronic devices capable of communicating through antennas, including but not limited to desktop computers, portable computers, smart phones, and tablet computers. It should be understood that the numbers of terminal devices, networks and servers in Fig. 1 are only illustrative. According to the implementation needs, there can be any number of terminal devices, networks and servers. For example, the server 105 may be a server cluster composed of multiple servers.

The methods for adjusting the SAR of electromagnetic waves provided by the embodiments of the present disclosure are generally implemented in the terminal devices 101 , 102 , and 103 , and correspondingly, the devices for adjusting the SAR of electromagnetic waves are generally set in the terminal devices 101 , 102 , and 103 . However, those skilled in the art can easily understand that the method for adjusting the specific absorption rate of electromagnetic waves provided by the embodiments of the present disclosure can also be executed by the server 105, and correspondingly, the device for adjusting the specific absorption rate of electromagnetic waves can also be set in the server 105. This is not specifically limited in the exemplary embodiments. For example, in an exemplary embodiment, the terminal devices 101, 102, and 103 may obtain the preset SAR thresholds corresponding to their regions, and then send the preset SAR thresholds and the current target transmission power to the server through the network 104 In 105, after receiving the preset SAR threshold and the current target transmission power, the server 105 determines the target mapping relationship through the preset SAR threshold, and determines the target antenna state corresponding to the target transmission power in the target mapping relationship, and then returns the target antenna state to The terminal devices 101, 102, and 103 adjust the antenna switches of the terminal devices so that the antennas of the terminal devices are in the target antenna state, and then adjust the electromagnetic wave specific absorption rate corresponding to the terminal devices.

An exemplary embodiment of the present disclosure provides an electronic device for implementing a method for adjusting the specific absorption rate of electromagnetic waves, which may be the terminal devices 101 , 102 , 103 or the server 105 in FIG. 1 . The electronic device includes at least a processor and a memory, the memory is configured to store executable instructions of the processor, and the processor is configured to execute the method for adjusting the specific absorption rate of electromagnetic waves by executing the executable instructions.

Taking the mobile terminal 200 in FIG. 2 as an example below, the structure of the electronic device will be exemplarily described. Those skilled in the art will appreciate that, in addition to components specifically intended for mobile purposes, the configuration in Fig. 2 can also be applied to equipment of a stationary type. In some other implementations, the mobile terminal 200 may include more or fewer components than shown, or combine some components, or separate some components, or arrange different components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware. The interface connection relationship among the various components is only schematically shown, and does not constitute a structural limitation on the mobile terminal 200 . In some other implementation manners, the mobile terminal 200 may also adopt an interface connection manner different from that in FIG. 2 , or a combination of multiple interface connection manners.

As shown in Figure 2, the mobile terminal 200 may specifically include: a processor 210, an internal memory 221, an external memory interface 222, a Universal Serial Bus (Universal Serial Bus, USB) interface 230, a charging management module 240, a power management module 241, battery 242, antenna 1, antenna 2, mobile communication module 250, wireless communication module 260, audio module 270, speaker 271, receiver 272, microphone 273, earphone interface 274, sensor module 280, display screen 290, camera module 291, indication device 292, motor 293, button 294, subscriber identification module (subscriber identification module, SIM) card interface 295, etc. The sensor module 280 may include a SAR sensor 2801, a depth sensor 2802, a pressure sensor 2803, and the like.

The processor 210 may include one or more processing units, for example: the processor 210 may include an application processor (Application Processor, AP), a modem processor, a graphics processor (Graphics Processing Unit, GPU), an image signal processor (Image Signal Processor, ISP), controller, video codec, digital signal processor (Digital Signal Processor, DSP), baseband processor and/or neural network processor (Neural-Network Processing Unit, NPU), etc. Wherein, different processing units may be independent devices, or may be integrated in one or more processors.

The wireless communication function of the mobile terminal 200 can be realized by the antenna 1, the antenna 2, the mobile communication module 250, the wireless communication module 260, a modem processor, a baseband processor, and the like. Among them, the antenna 1 and the antenna 2 are configured to transmit and receive electromagnetic wave signals; the mobile communication module 250 can provide solutions for wireless communication including 2G/3G/4G/5G applied on the mobile terminal 200; the modem processor can Including a modulator and a demodulator; the wireless communication module 260 can provide applications on the mobile terminal 200 including wireless local area networks (Wireless Local Area Networks, WLAN) (such as wireless fidelity (Wireless Fidelity, Wi-Fi) network), bluetooth ( Bluetooth, BT) and other wireless communication solutions. 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. Wherein, the antenna 1 and the antenna 2 are configured with an antenna switch, which is configured to switch the state of the antenna, so as to adjust the electromagnetic wave specific absorption rate corresponding to the terminal device.

The SAR sensor 2801 is configured to reflect the SAR value of the situation where the mobile terminal 200 is in contact with the user during use.

The depth sensor 2802 is configured to acquire depth information of the scene. The pressure sensor 2803 is configured to sense pressure signals and convert the pressure signals into electrical signals. In addition, sensors with other functions can also be set in the sensor module 280 according to actual needs, such as gyroscope sensors, air pressure sensors, magnetic sensors, acceleration sensors, distance sensors, proximity light sensors, fingerprint sensors, temperature sensors, touch sensors, ambient light sensors, bone conduction sensors, etc.

The mobile terminal 200 may also include other devices providing auxiliary functions. For example, the key 294 includes a power key, a volume key, etc., and the user may input key signals related to user settings and function control of the mobile terminal 200 through key input. For another example, indicator 292, motor 293, SIM card interface 295, etc. In some embodiments, the region where the terminal device is currently located and the preset SAR threshold corresponding to the region can be determined through the SIM card inserted into the SIM card interface 295 .

Electromagnetic wave specific absorption rate (Specific Absorption Rate, SAR) refers to the electromagnetic radiation energy absorbed by a unit mass of matter per unit time. In the currently commonly used 5G mobile terminals, regardless of domestic or overseas markets, the SAR value needs to be controlled according to local regulations.

In related technologies, when the measured SAR value is greater than the preset SAR threshold of the specified safety standard, there are two general solutions: one is to adjust the matching topology of the antenna to change the distribution of hot spots or the radiation performance of the antenna, thereby To achieve the purpose of reducing the SAR value; the second is to identify various application scenarios through hotspots or some sensors, and then reduce the RF output power according to different application scenarios, so that the SAR value of the antenna is lower than the specified safety standard.

Regarding the above two methods, the first method can essentially solve the problem of SAR value exceeding the standard by adjusting the antenna matching topology, but it will affect the performance of the antenna in all application scenarios, and it cannot actively do targeted scene identification, so it may It will lead to the situation that the basic functions of the antenna cannot be realized in a specific scene, thus affecting the actual experience of consumers in the whole scene; the second method can directly and effectively reduce the SAR value by reducing the RF output power, but the same far-field performance of the mobile phone There will also be corresponding sacrifices, which will affect the actual experience of consumers; at the same time, under some standards (such as 3GPP) that require the lower limit of RF output power, when the SAR value seriously exceeds the standard, this method cannot completely Effectively solve the problem that the SAR value exceeds the standard. Turning on the hot spot (hot-spot) can effectively solve the SAR problem under the FCC standard at 10mm, but it can't do anything about 0mm. Certain specific scenarios can be effectively identified through some sensors, so as to reduce the RF output power of the scenario in a targeted manner. However, it is difficult to make a trade-off due to considerations of the space, cost, sensor validation conditions of the mobile phone, and the complexity of SAR testing. It is difficult to cover complex user scenarios, which belongs to the method of passively reducing the SAR value.

Based on one or more of the above problems, this exemplary embodiment provides a new method for adjusting the specific absorption rate of electromagnetic waves. The method for adjusting the specific absorption rate of electromagnetic waves may be applied to the above-mentioned server 105, and may also be applied to one or more of the above-mentioned terminal devices 101, 102, and 103, which is not specifically limited in this exemplary embodiment. Referring to FIG. 3, the method for adjusting the electromagnetic wave specific absorption rate may include the following steps S310 to S330:

In step S310, the target mapping relationship corresponding to the region is determined according to the preset SAR threshold corresponding to the region where the terminal device is located.

Among them, the preset SAR threshold corresponding to the region can be set according to the current regulations of each country and region to control the SAR value. For example, the European standard is 2w/kg, and the American standard is 1.6w/kg; the target mapping relationship may include the mapping relationship between transmit power and antenna state.

Among them, in the target mapping relationship, the transmission power usually covers all the transmission power that the terminal equipment can achieve under the communication standard; the antenna state includes multiple states that can be switched by the antenna switch, and the far-field performance of the antenna corresponding to each state is different. For example, assume that a certain antenna switch has three switchable states A, B, and C, and in the three states, the order of the far-field performance of the antenna is A>B>C.

In an exemplary embodiment, before the target mapping relationship corresponding to the region is determined according to the preset SAR threshold corresponding to the region where the terminal device is located, the corresponding mapping relationship can be set in advance for the preset SAR values corresponding to all regions in the world, and stored on the terminal device or server. After the terminal device is powered on, it can directly obtain the preset SAR value corresponding to the region where the terminal device is currently located, and then find the target mapping relationship corresponding to the preset SAR value in the mapping relationship stored in advance, and then perform subsequent processing.

It should be noted that since different terminal devices may have different antenna states that can be switched by the antenna switch, when the mapping relationship is set in advance, different settings may be made for different terminal device models. On this basis, if the mapping relationship is stored in the server, it can be stored separately according to the terminal device model, so that terminal devices of different models can determine the target mapping relationship in the corresponding mapping relationship.

In an exemplary embodiment, when the antenna switch corresponds to N types of antenna states, and each antenna state corresponds to a different far-field performance, determine the target mapping relationship reference map corresponding to the region according to the preset SAR threshold corresponding to the region where the terminal device is located 4, may include the following steps S410 to S430:

In step S410, a first antenna state is determined among N antenna states according to a preset SAR threshold.

In an exemplary embodiment, the first antenna state may include an antenna state that satisfies a preset SAR threshold certification and has a maximum far-field performance. At this point, when determining the state of the first antenna, you can first adjust the transmit power of the terminal device to the maximum transmit power corresponding to the terminal device, then test the test SAR values corresponding to the N antenna states, and obtain the test SAR value; after obtaining the test SAR After the value, the set of antenna states corresponding to the test SAR value less than or equal to the preset SAR threshold is used as the second state set; then find the antenna state with the largest far-field performance in the second state set and determine it as the first antenna state.

Wherein, satisfying the preset SAR threshold certification means that when the terminal device is at the maximum transmission power allowed by the communication standard, the test SAR value corresponding to the antenna state is smaller than the preset SAR threshold. N takes an integer greater than 1; the maximum transmit power corresponding to the terminal device refers to the maximum transmit power that can be used when the current communication standard allows the terminal device to perform radio frequency transmission.

It should be noted that due to the different antenna states that can be switched in different terminal devices, the corresponding far-field performance may also be different. Therefore, after the terminal device is manufactured, the far-field performance of various antenna states can be stored in the terminal device in advance. or store their far-field performance data on the server for different types of terminal devices. When it is necessary to judge the size of the far-field performance, the terminal device can directly obtain and use it from the server through the network.

In step S420, a first state set is established based on antenna states whose far-field performance is greater than or equal to the first antenna state.

In an exemplary embodiment, after the first antenna state is obtained, a set of all antenna states whose far-field performance is greater than or equal to the first antenna state among the N antenna states corresponding to the antenna switch may be used as the first state set.

Since the first antenna state is the antenna state that satisfies the preset SAR threshold certification and has the largest far-field performance, and at the same time, under the same transmission frequency, the far-field performance of the antenna is positively correlated with the SAR value. Therefore, when the transmission frequency of the terminal device does not reach the maximum transmission frequency allowed by the communication standard, the SAR value corresponding to the antenna state whose far-field performance is greater than the first antenna state may be smaller than the preset SAR threshold. Based on this principle, the mapping relationship can be established based on the first antenna state set, so as to avoid communication through the antenna state whose far-field performance is lower than the first antenna state under the premise that the first antenna state meets the preset SAR threshold authentication The resulting sacrifice of far-field performance.

In step S430, the target mapping relationship is determined based on the preset SAR threshold and the first state set.

In an exemplary embodiment, after the preset SAR threshold and the first state set are obtained, a target mapping relationship may be jointly established based on the preset SAR threshold and the first state set. Specifically, the maximum transmission power corresponding to each antenna state in the first state set may be determined first based on the preset SAR threshold, and then a target mapping relationship is established according to each antenna state and the maximum transmission power corresponding to each antenna state.

The maximum transmit power corresponding to each antenna state refers to the transmit power corresponding to the terminal device when the test SAR value is equal to the preset SAR threshold in the antenna state.

In an exemplary embodiment, when the first antenna set includes K (K is a positive integer less than or equal to N) antenna states, the target mapping relationship is established based on each antenna state and the maximum transmit power corresponding to each antenna state, refer to As shown in FIG. 5, the following steps S510 to S530 may be included:

In step S510, K transmit power ranges are established according to the magnitude relationship of the maximum transmit power corresponding to each antenna state.

In an exemplary embodiment, since the first antenna state is determined based on the preset SAR threshold under the condition that the terminal device is adjusted to the maximum transmit power allowed by the communication standard, the maximum transmit power corresponding to the first antenna state is equal to the communication The maximum transmit power of the terminal equipment allowed by the standard; at the same time, when setting the antenna state, generally the maximum transmit power corresponding to the antenna state will not be set to be less than the minimum transmit power allowed by the communication standard. At this time, as shown in FIG. 6 , K transmit power ranges may be established based on the relationship between the minimum transmit power of the terminal device allowed by the communication standard and the maximum transmit power corresponding to the K antenna states. Wherein, based on the above determination process of the first antenna state, it can be known that the maximum transmit power K corresponding to the first antenna state is equal to the maximum transmit power corresponding to the terminal device.

In step S520, for each transmit power range, an antenna state with a maximum transmit power equal to the maximum value of the transmit power range is configured as an antenna state corresponding to the transmit power range.

In an exemplary embodiment, after obtaining K transmit power ranges, for each transmit power range, the antenna state whose maximum transmit power corresponding to the antenna state is equal to the maximum value of the transmit power range can be configured as the transmit power range Corresponding antenna status. For example, the maximum transmit power corresponding to antenna state 1 and antenna state 2 set by a certain terminal is n1 and n2 respectively, assuming that n1 is greater than n2, at this time it can be determined that the transmit power range is [n2, n1), and then the maximum transmit power is equal to n1 Antenna state 1 of is configured as the antenna state corresponding to the transmit power range [n2, n1).

It should be noted that since the maximum transmit power corresponding to the antenna state is calculated when it is equal to the preset SAR threshold, when setting the transmit power range, the maximum transmit power corresponding to a certain antenna state is usually set when the long-range performance is lower than the threshold. within the transmit power range of the antenna state. For example, in the above example, if the transmit power range corresponding to antenna state 2 with the maximum transmit power equal to n2 is set to include n2, the SAR may be exactly equal to the preset SAR threshold. In marginal cases, it is usually chosen to set a value equal to n2 in the transmit power range corresponding to antenna state 1 whose far-field performance is lower than antenna state 2, that is, [n2, n1).

In step S530, a target mapping relationship is generated based on the K transmit power ranges and antenna states corresponding to each transmit power range.

In an exemplary embodiment, after K transmission power ranges and antenna states corresponding to each transmission power range are obtained, target mapping relationships may be generated based on K groups of correspondence relationships. Through the setting of this target mapping relationship, the problem of exceeding the SAR value can be effectively solved while affecting the user experience as little as possible; at the same time, by using the switching device, in addition to the function of the antenna switch itself to tune the performance of the antenna In addition, it can also be configured to identify the target transmission power of the mobile phone itself under the current network, and dynamically call a variety of different antenna states corresponding to the antenna switch, thereby achieving the purpose of reducing the SAR value without reducing the RF output power.

In addition, in an exemplary embodiment, it may happen that the second state set is empty, that is, all antenna states cannot meet the preset SAR threshold authentication. At this time, the first antenna state that satisfies the preset SAR threshold authentication cannot be determined among the N antenna states. In this case, when determining the target mapping relationship corresponding to the region according to the preset SAR threshold corresponding to the region where the terminal device is located, the second antenna state with the lowest far-field performance can be determined first among the N antenna states; and then based on the second antenna The state determines the RF conductance value and establishes a target mapping relationship based on the RF conductance value.

In an exemplary embodiment, when the radio frequency conduction value is determined based on the second antenna state, and the target mapping relationship is established based on the radio frequency conduction value pair, the maximum transmit power corresponding to the second antenna state may be first determined based on the preset SAR threshold; and then Calculate the difference between the maximum transmit power corresponding to the second antenna state and the maximum transmit power corresponding to the terminal device to obtain the radio frequency conduction value; at the same time, determine the N maximum transmit powers corresponding to the N antenna states based on the preset SAR threshold; and then pass the radio frequency conduction The N maximum transmit powers are adjusted to obtain N adjusted maximum transmit powers; and then the target mapping relationship is established based on the N antenna states and the adjusted maximum transmit powers corresponding to each antenna state.

Among them, the maximum transmit power corresponding to the terminal device refers to the maximum transmit power that the current communication standard allows the terminal device to use for radio frequency transmission; The difference between the maximum transmit power and the RF conduction value. For example, assuming that the calculated radio frequency conduction value is γ, and the maximum transmission power corresponding to a certain antenna state is n3, the adjustment result of the antenna state is n3-γ.

In an exemplary embodiment, after obtaining the N antenna states and the adjusted maximum transmit power corresponding to each antenna state, similarly, when establishing the target mapping relationship, the minimum transmit power of the terminal device allowed by the communication standard can be The relationship between the power and the adjusted maximum transmit power corresponding to the N antenna states can establish N transmit power ranges; then for each transmit power range, the adjusted maximum transmit power corresponding to the antenna state can be compared with the maximum transmit power range Antenna states with equal values are configured as antenna states corresponding to the transmit power range; then target mapping relationships are generated based on N groups of corresponding relationships.

It should be noted that the process of establishing the target mapping relationship through N antenna states and the adjusted maximum transmit power corresponding to each antenna state is the same as establishing the target mapping relationship through K antenna states and the maximum transmit power corresponding to each antenna state Similarly, undisclosed details can refer to the content of this part, and thus will not be repeated here.

In step S320, the current target transmit power of the terminal device is read, and the target antenna state corresponding to the target transmit power is determined based on the target mapping relationship.

In an exemplary embodiment, after the target mapping relationship is obtained, the current target transmit power of the terminal device may be read, and then the target antenna state corresponding to the target transmit power is determined in the target mapping relationship. For example, if the current target transmit power of the read terminal device is n4, and in the target mapping relationship, the antenna state corresponding to n4 is antenna state 1, then it is determined that the target antenna state is antenna state 1.

In step S330, the antenna switch of the terminal device is adjusted so that the antenna of the terminal device is in a target antenna state, so as to adjust the electromagnetic wave specific absorption rate corresponding to the terminal device.

In an exemplary embodiment, after the target antenna state is obtained, the antenna switch of the terminal device may be adjusted so that the antenna state of the terminal device is in the target antenna state, and then the electromagnetic wave SAR corresponding to the terminal device may be adjusted. By monitoring the current transmit power in real time, different antenna states can be called dynamically in multiple stages to achieve the purpose of adjusting the SAR value. In this disclosure, the antenna switch is not only used as a tuning device, but also can be used as a sensor to dynamically adjust the SAR value. In addition, the cost of the antenna switch is relatively low, and the cost is lower than that of the adjustment method implemented by means of sensors.

It should be noted that the technical solutions of the embodiments of the present disclosure can realize the same function in 2G, 3G, 4G, 5G and other network standards such as GSM, CDMA, TDSCDMA, WCDMA, LTE, and NR.

In the following, the antenna switch corresponds to the three antenna states A, B, and C, and the relationship between the far-field performance of the antenna is A>B>C, and the transmission power is represented by the transmission power adjustment value TXAGC value as an example, and the technical solutions of the embodiments of the present disclosure To elaborate:

When the antenna with the antenna switch is in the receive-only state, the problem of meeting the preset SAR threshold certification is not involved, so the adjustment of the antenna switch is not required;

When the antenna is in the transmitting state, adjust the antenna switch so that the antenna is in the antenna state A, B or C, adjust the transmit power of the terminal device to the maximum transmit power corresponding to the terminal device, and test the test SAR values corresponding to the three antenna states, based on less than The antenna states corresponding to the test SAR values equal to the preset SAR threshold establish a second state set. Since the preset SAR thresholds stipulated by regulations in various regions are different, there are two possibilities for the second state set:

One is that the second state set is not empty. When the antenna switch corresponds to three antenna states A, B, and C, there are the following three situations:

First, when the second state set includes antenna states A, B, and C at the same time, the determined target mapping relationship is shown in Table 1.

Second, when the second state set includes antenna states B and C at the same time, the determined target mapping relationship is shown in Table 2.

Third, when only the antenna state C is included in the second state set, the determined target mapping relationship is shown in Table 3.

Table 1 The target mapping relationship determined when the second state set includes three antenna states

TXAGC value	antenna status
Minimum transmit power ≤ TXAGC ≤ maximum transmit power	A

Table 2 The target mapping relationship determined when the second state set includes two antenna states

TXAGC value	antenna status
Minimum transmit power≤TXAGC＜α	A
α≤TXAGC≤maximum transmit power	B

Table 3 The target mapping relationship determined when one antenna state is included in the second state set

TXAGC value	antenna status
Minimum transmit power≤TXAGC＜α	A
α≤TXAGC<β	B
β≤TXAGC≤maximum transmit power	C

Among them, α and β are the maximum transmit power corresponding to antenna state A and antenna state B respectively; the maximum transmit power and minimum transmit power refer to the minimum transmit power and maximum transmit power that can be used when the current communication standard allows the terminal device to perform radio frequency transmission.

In Table 1, since the second state set includes three antenna states at the same time, that is, the maximum transmit power α corresponding to antenna state A is greater than or equal to the maximum transmit power corresponding to the terminal device. Therefore, the first antenna state is antenna state A, and the corresponding first state set only includes antenna state A, and Table 1 is obtained.

In Table 2, since the second state set includes two antenna states at the same time, that is, the maximum transmit power α corresponding to antenna state A is less than the maximum transmit power corresponding to the terminal device, and the maximum transmit power β corresponding to antenna state B is greater than or equal to the terminal The maximum transmit power corresponding to the device. Therefore, the first antenna state is antenna state B, and the corresponding first state set includes antenna states B and A. Among them, when the transmission power is less than α, the antenna state A can reduce the far-field performance loss (compared to the antenna state B) on the premise that the SAR value does not exceed the preset SAR threshold, so Table 2 is obtained.

In Table 3, since only one antenna state is included in the second state set, that is, the maximum transmit power corresponding to antenna state A and antenna state B is smaller than the maximum transmit power corresponding to the terminal device, but the maximum transmit power corresponding to antenna C is greater than It is equal to the maximum transmit power corresponding to the terminal equipment. Therefore, the first antenna state is antenna state C, and the corresponding first state set includes antenna states C, B, and A. Among them, when the transmission power is less than β, the antenna state B can meet the SAR value does not exceed the preset SAR threshold, and reduce the far-field performance loss (relative to the antenna state C); when the transmission power is less than α, the antenna state A can meet On the premise that the SAR value does not exceed the preset SAR threshold, the far-field performance loss (relative to antenna state B) is reduced, so Table 3 is obtained.

In the case where only the antenna state C is included in the second state set, if only one antenna state is used, only the antenna state C can be used on the premise that the preset SAR threshold is met. At this time, the throughput performance of the antenna is shown in Figure 7a; and using the target mapping relationship shown in Table 3, the throughput performance of the antenna is shown in Figure 7b, where the area 1 and area 2 are the performance improvements compared to Figure 7a .

In some embodiments, α and β may also be set to values smaller than the maximum transmit power corresponding to antenna state A and antenna state B according to actual needs. For example, after determining the maximum transmit power corresponding to antenna state A and antenna state B, the maximum transmit power may be multiplied by a coefficient less than 1 at the same time. It should be noted that when α and β respectively take the maximum transmit power corresponding to antenna state A and antenna state B, the improvement of throughput performance can be maximized (as shown in area 1 and area 2 in Figure 7b).

The other is that the second state set is empty. When the antenna switch corresponds to three antenna states A, B, and C, the first antenna state cannot be determined because the second state set is empty. At this time, the determined target mapping relationship is shown in Table 4.

Table 4 The target mapping relationship determined when the second state set is space-time

TXAGC value	antenna status
Minimum transmit power≤TXAGC＜α-γ	A
α-γ≤TXAGC<β-γ	B
β-γ≤TXAGC≤Maximum transmit power-γ	C

Among them, α and β are the maximum transmit power corresponding to antenna state A and antenna state B respectively; γ is the radio frequency conduction value calculated based on antenna state C; the maximum transmit power and the minimum transmit power refer to the current communication standard that allows the terminal equipment to conduct radio frequency The minimum transmit power and the maximum transmit power that can be used during transmission.

To sum up, in this exemplary embodiment, different antenna states can be invoked by reading the current transmit power in all scenarios of the user application. On the one hand, the antenna state can be switched by setting the target mapping relationship, so as to achieve the purpose of adjusting the SAR value without reducing the RF output power, so as to ensure the certification that meets the preset SAR threshold; on the other hand, it can Ensure that the antenna calls the antenna state with greater far-field performance in as many scenarios as possible to ensure throughput performance. In addition, the power consumption of the antenna is also optimized to a certain extent.

It should be noted that the above-mentioned figures are only schematic illustrations of processes included in the method according to the exemplary embodiments of the present disclosure, and are not intended to be limiting. It is easy to understand that the processes shown in the above figures do not imply or limit the chronological order of these processes. In addition, it is also easy to understand that these processes may be executed synchronously or asynchronously in multiple modules, for example.

Further, referring to FIG. 8 , the embodiment of this example also provides an apparatus 800 for adjusting the specific absorption rate of electromagnetic waves, including a mapping determination module 810 , a target determination module 820 and a state adjustment module 830 . in:

The mapping determination module 810 may be configured to determine a target mapping relationship corresponding to the region according to a preset SAR threshold corresponding to the region where the terminal device is located; wherein the target mapping relationship includes a mapping relationship between transmit power and antenna state.

The target determining module 820 may be configured to read the current target transmit power of the terminal device, and determine a target antenna state corresponding to the target transmit power based on the target mapping relationship.

The state adjustment module 830 may be configured to adjust the antenna switch of the terminal device so that the antenna of the terminal device is in the target antenna state, so as to adjust the corresponding electromagnetic wave specific absorption rate of the terminal device.

In an exemplary embodiment, when the antenna switch corresponds to N types of antenna states, and each antenna state corresponds to a different far-field performance, the mapping determination module 810 may be configured to switch between the N types according to the preset SAR threshold. Determine the first antenna state among the antenna states; establish a first state set based on the antenna state whose far-field performance is greater than or equal to the first antenna state; determine based on the preset SAR threshold and the first state set Target mapping relationship. Wherein, N is an integer greater than 1.

In an exemplary embodiment, the mapping determination module 810 may be configured to test the test SAR values corresponding to the N antenna states when adjusting the transmit power of the terminal device to the maximum transmit power corresponding to the terminal device, and Establish a second state set based on the antenna state corresponding to the test SAR value less than or equal to the preset SAR threshold; determine the antenna state with the largest far-field performance in the second state set as the corresponding to the region The state of the first antenna.

In an exemplary embodiment, the mapping determination module 810 may be configured to determine the maximum transmission power corresponding to each antenna state in the first state set based on a preset SAR threshold; based on each of the antenna states and each of the antenna states The corresponding maximum transmit power establishes a target mapping relationship.

In an exemplary embodiment, when the first antenna set includes K antenna states, the mapping determination module 810 may be configured to establish K transmit power ranges according to the magnitude relationship of the maximum transmit power corresponding to each of the antenna states; For each of the transmit power ranges, configure the antenna state with the maximum transmit power equal to the maximum value of the transmit power range as the antenna state corresponding to the transmit power range; based on the K transmit power ranges and each An antenna state corresponding to the transmit power range generates the target mapping relationship. Wherein, K is a positive integer less than or equal to N.

In an exemplary embodiment, when the second state set is empty, the mapping determination module 810 may be configured to determine the second antenna state with the lowest far-field performance among the N antenna states; Two antenna states determine the radio frequency conduction value, and establish a target mapping relationship based on the radio frequency conduction value.

In an exemplary embodiment, the mapping determination module 810 may be configured to determine the maximum transmit power corresponding to the second antenna state based on a preset SAR threshold; calculate the maximum transmit power corresponding to the second antenna state and the terminal The difference between the maximum transmission powers corresponding to the equipment is obtained to obtain the radio frequency conduction value; the N maximum transmission powers corresponding to the N antenna states are respectively determined based on the preset SAR threshold; the N maximum transmission powers and the radio frequency conduction values are respectively calculated difference, to obtain N adjusted maximum transmit powers; and establish a target mapping relationship based on the N antenna states and the adjusted maximum transmit powers corresponding to the antenna states.

In an exemplary embodiment, the mapping determination module 810 may be configured to establish N transmit power ranges according to the magnitude relationship of the adjusted maximum transmit power corresponding to each of the antenna states; for each of the transmit power ranges , configuring the antenna state with the adjusted maximum transmit power equal to the maximum value of the transmit power range as the antenna state corresponding to the transmit power range; based on the N transmit power ranges and each of the transmit power ranges The corresponding antenna state generates the target mapping relationship.

The specific details of each module in the above device have been described in detail in the implementation of the method, and details not disclosed can be found in the implementation of the method, so details are not repeated here.

Those skilled in the art can understand that various aspects of the present disclosure can be implemented as a system, method or program product. Therefore, various aspects of the present disclosure can be embodied in the following forms, namely: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software, which can be collectively referred to herein as "circuit", "module" or "system".

Exemplary embodiments of the present disclosure also provide a computer-readable storage medium on which a program product capable of implementing the above-mentioned method in this specification is stored. In some possible implementations, various aspects of the present disclosure can also be implemented in the form of a program product, which includes program code, and when the program product is run on the terminal device, the program code is configured to make the terminal device execute this specification For the steps described in the above "Exemplary Method" section according to various exemplary embodiments of the present disclosure, for example, any one or more steps in Fig. 3 to Fig. 5 may be performed.

It should be noted that the computer-readable medium shown in the present disclosure may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. A computer readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, electrical connections with one or more wires, portable computer diskettes, hard disks, random access memory (RAM), read-only memory (ROM), erasable Programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.

In the present disclosure, a computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In the present disclosure, however, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave carrying computer-readable program code therein. Such propagated data signals may take many forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device. . Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Additionally, program code for performing the operations of the present disclosure may be written in any combination of one or more programming languages, including object-oriented programming languages—such as Java, C++, etc., as well as conventional procedural Programming language - such as "C" or a similar programming language. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server to execute. In cases involving a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., using an Internet service provider). business to connect via the Internet).

Other embodiments of the disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, and these modifications, uses or adaptations follow the general principles of the present disclosure and include common knowledge or conventional technical means in the technical field not disclosed in the present disclosure . The specification and examples are to be considered exemplary only, with the true scope and spirit of the disclosure indicated by the appended claims.

It should be understood that the present disclosure is not limited to the precise constructions which have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (20)

1. A method for adjusting the specific absorption rate of electromagnetic waves, comprising:

   Determine the target mapping relationship corresponding to the region according to the preset SAR threshold corresponding to the region where the terminal device is located; wherein the target mapping relationship includes a mapping relationship between transmit power and antenna state;

   Reading the current target transmit power of the terminal device, and determining a target antenna state corresponding to the target transmit power based on the target mapping relationship;

   The antenna switch of the terminal device is adjusted so that the antenna of the terminal device is in the target antenna state, so as to adjust the electromagnetic wave specific absorption rate corresponding to the terminal device.
2. The method according to claim 1, wherein the antenna switch corresponds to N antenna states, and each antenna state corresponds to a different far-field performance; wherein, N is an integer greater than 1;

   The determining the target mapping relationship corresponding to the region according to the preset SAR threshold corresponding to the region where the terminal device is located includes:

   determining a first antenna state among the N antenna states according to the preset SAR threshold;

   establishing a first set of states based on the antenna states having the far-field performance greater than or equal to the first antenna state;

   Determine a target mapping relationship based on the preset SAR threshold and the first state set.
3. The method according to claim 2, wherein the first antenna state includes an antenna state that satisfies the preset SAR threshold certification and has the largest far-field performance;

   Wherein, the authentication of satisfying the preset SAR threshold is that the test SAR value corresponding to the antenna state is smaller than the preset SAR threshold when the terminal device is at the maximum transmission power allowed by the communication standard.
4. The method according to claim 2, wherein said determining the first antenna state among the N antenna states according to the preset SAR threshold comprises:

   When adjusting the transmit power of the terminal device to the maximum transmit power corresponding to the terminal device, test the test SAR values corresponding to the N antenna states, and correspond to the test SAR values based on the test SAR values less than or equal to the preset SAR threshold Antenna state of the establishment of the second state set;

   In the second state set, the antenna state with the largest far-field performance is determined as the first antenna state corresponding to the region.
5. The method according to claim 2, wherein the determining the target mapping relationship based on the preset SAR threshold and the first state set comprises:

   determining the maximum transmit power corresponding to each antenna state in the first state set based on a preset SAR threshold;

   A target mapping relationship is established based on each of the antenna states and the maximum transmit power corresponding to each of the antenna states.
6. The method according to claim 5, wherein the maximum transmit power corresponding to the antenna state is the transmit power corresponding to the terminal device when the test SAR value is equal to the preset SAR threshold in the antenna state.
7. The method according to claim 5, wherein the first antenna set includes K antenna states; wherein K is a positive integer less than or equal to N;

   The establishment of a target mapping relationship based on each of the antenna states and the maximum transmit power corresponding to each of the antenna states includes:

   Establishing K transmit power ranges according to the magnitude relationship of the maximum transmit power corresponding to each antenna state;

   For each of the transmission power ranges, configuring the antenna state with the maximum transmission power equal to the maximum value of the transmission power range as the antenna state corresponding to the transmission power range;

   The target mapping relationship is generated based on the K transmission power ranges and antenna states corresponding to each of the transmission power ranges.
8. The method according to claim 7, wherein the establishment of K transmit power ranges according to the magnitude relationship of the maximum transmit power corresponding to each of the antenna states includes:

   When setting the transmission power range, the maximum transmission power corresponding to the antenna state is set within the transmission power range whose long-range performance is lower than that of the antenna state.
9. The method according to claim 4, wherein when the second state set is empty, determining the target mapping relationship corresponding to the region according to the preset SAR threshold corresponding to the region where the terminal device is located further comprises:

   determining a second antenna state with the lowest far-field performance among the N antenna states;

   Determine a radio frequency conduction value based on the second antenna state, and establish a target mapping relationship based on the radio frequency conduction value.
10. The method according to claim 9, wherein said determining the radio frequency conduction value based on the second antenna state, and establishing a target mapping relationship based on the radio frequency conduction value, comprises:

    determining a maximum transmit power corresponding to the second antenna state based on a preset SAR threshold;

    calculating the difference between the maximum transmission power corresponding to the second antenna state and the maximum transmission power corresponding to the terminal device, to obtain a radio frequency conduction value;

    Determine N maximum transmission powers corresponding to the N antenna states based on preset SAR thresholds;

    respectively calculating the difference between the N maximum transmission powers and the radio frequency conduction value to obtain N adjusted maximum transmission powers;

    A target mapping relationship is established based on the N antenna states and the adjusted maximum transmit power corresponding to each of the antenna states.
11. The method according to claim 10, wherein the establishment of a target mapping relationship based on the N antenna states and the adjusted maximum transmit power corresponding to each of the antenna states includes:

    Establishing N transmit power ranges according to the magnitude relationship of the adjusted maximum transmit power corresponding to each antenna state;

    For each of the transmission power ranges, configuring the antenna state in which the adjusted maximum transmission power is equal to the maximum value of the transmission power range as the antenna state corresponding to the transmission power range;

    The target mapping relationship is generated based on the N transmit power ranges and antenna states corresponding to each of the transmit power ranges.
12. The method according to claim 1, wherein the determining the target mapping relationship corresponding to the region according to the preset SAR threshold corresponding to the region where the terminal device is located comprises:

    According to the model of the terminal device, the target mapping relationship is determined in the mapping relationship between the location of the terminal device and the preset SAR value preset for different terminal device models.
13. A device for adjusting the specific absorption rate of electromagnetic waves, comprising:

    The mapping determination module is configured to determine a target mapping relationship corresponding to the region according to a preset SAR threshold corresponding to the region where the terminal device is located; wherein the target mapping relationship includes a mapping relationship between transmit power and antenna state;

    A target determination module configured to read the current target transmit power of the terminal device, and determine a target antenna state corresponding to the target transmit power based on the target mapping relationship;

    The state adjustment module is configured to adjust the antenna switch of the terminal device, so that the antenna of the terminal device is in the target antenna state, so as to adjust the electromagnetic wave specific absorption rate corresponding to the terminal device.
14. The device according to claim 13, wherein the antenna switch corresponds to N antenna states, and each antenna state corresponds to a different far-field performance, and the mapping determination module is configured to:

    determining a first antenna state among the N antenna states according to the preset SAR threshold;

    establishing a first set of states based on the antenna states having the far-field performance greater than or equal to the first antenna state;

    determining a target mapping relationship based on the preset SAR threshold and the first state set;

    Wherein, N is an integer greater than 1.
15. The device according to claim 14, wherein the mapping determination module is configured to:

    When adjusting the transmit power of the terminal device to the maximum transmit power corresponding to the terminal device, test the test SAR values corresponding to the N antenna states, and correspond to the test SAR values based on the test SAR values less than or equal to the preset SAR threshold The antenna state of the second state set is established;

    In the second state set, the antenna state with the largest far-field performance is determined as the first antenna state corresponding to the region.
16. The device according to claim 14, wherein the mapping determination module is configured to:

    determining the maximum transmit power corresponding to each antenna state in the first state set based on a preset SAR threshold;

    A target mapping relationship is established based on each of the antenna states and the maximum transmit power corresponding to each of the antenna states.
17. The apparatus according to claim 16, wherein when the first antenna set includes K antenna states, the mapping determination module is configured to:

    Establishing K transmit power ranges according to the magnitude relationship of the maximum transmit power corresponding to each antenna state;

    For each of the transmission power ranges, configuring the antenna state with the maximum transmission power equal to the maximum value of the transmission power range as the antenna state corresponding to the transmission power range;

    generating the target mapping relationship based on the K transmit power ranges and antenna states corresponding to each of the transmit power ranges;

    Wherein, K is a positive integer less than or equal to N.
18. The device according to claim 15, wherein, when the second state set is empty, the mapping determining module is configured to:

    determining a second antenna state with the lowest far-field performance among the N antenna states;

    Determine a radio frequency conduction value based on the second antenna state, and establish a target mapping relationship based on the radio frequency conduction value.
19. A computer-readable medium, on which a computer program is stored, and when the computer program is executed by a processor, the method according to any one of claims 1 to 12 is realized.
20. An electronic device comprising:

    processor; and

    a memory configured to store executable instructions of the processor;

    Wherein, the processor is configured to perform the method according to any one of claims 1 to 12 by executing the executable instructions.

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