Transmission power control method and related device

Abstract

The invention provides a transmitting power control method and a related device. The method is applied to the electronic equipment, the electronic equipment comprises a first antenna, the first antenna is used for generating a plurality of beams, a beam mapping table is arranged in the electronic equipment, the beam mapping table comprises a plurality of preset power rollback values in one-to-one correspondence with the plurality of beams, and the method comprises the following steps: controlling the transmission power rollback of a currently used beam according to the beam mapping table, the SAR of the currently used beam is enabled to meet the standard, and the currently used beam is one of a plurality of beams generated by the first antenna. According to the embodiment of the invention, the method for controlling the transmitting power is carried out for the beam mapping table, the problem that the communication quality is poor due to the fact that part of antennas on the multi-beam antenna are too much in the power back-off process is solved, and the communication quality after SAR back-off is improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a transmission power control method and related devices. Background Art

[0002] With the development of electronic technology, electronic devices (such as mobile phones, tablet computers, etc.) are increasingly used. In the process of using electronic devices for communication, the electromagnetic radiation of electronic devices may have an impact on user safety. Generally speaking, the safety impact of electromagnetic radiation of electronic devices on users can be defined by the Specific Absorption Rate (SAR) standard.

[0003] In order to reduce the impact of electronic devices on user safety, SAR power backoff is defined in the relevant technology. The current SAR power backoff is mainly for single-beam antennas. However, as users require more multi-functional electronic devices, electronic devices with multi-beam antennas have gradually emerged. How to perform SAR power backoff on multi-beam antennas has become an urgent problem to be solved. Summary of the invention

[0004] The present application provides a method for controlling transmission power and a related device. The following introduces various aspects involved in the embodiments of the present application.

[0005] In a first aspect, a method for controlling transmission power is provided, the method being applied to an electronic device, the electronic device comprising a first antenna, the first antenna being used to generate multiple beams, the electronic device being provided with a beam mapping table, the beam mapping table comprising multiple preset power backoff values ​​corresponding one-to-one to the multiple beams, the method comprising: controlling the transmission power backoff of a currently used beam according to the beam mapping table so that the SAR of the currently used beam meets the standard, the currently used beam being one of the multiple beams generated by the first antenna.

[0006] In a second aspect, a transmission power control device is provided, which is applied to an electronic device, wherein the electronic device includes a first antenna, the first antenna is used to generate multiple beams, a beam mapping table is provided in the electronic device, the beam mapping table includes multiple preset power back-off values ​​corresponding one-to-one to the multiple beams, and the device includes: a control module, used to control the transmission power back-off of a currently used beam according to the beam mapping table so that the SAR of the currently used beam meets the standard, and the currently used beam is one of the multiple beams generated by the first antenna.

[0007] According to a third aspect, a chip is provided, comprising: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes the method described in the first aspect.

[0008] According to a fourth aspect, a computer-readable storage medium is provided, on which executable code is stored, wherein the code is used to implement the method described in the first aspect.

[0009] The embodiment of the present application provides a method for controlling transmission power, which can control the backoff of the transmission power of the currently used beam based on the beam mapping table set in the electronic device, so that the SAR of the currently used beam meets the standard. Among them, the beam mapping table includes a plurality of preset power backoff values ​​corresponding one by one to the plurality of beams generated by the first antenna included in the electronic device. Due to the existence of the beam mapping table, the power backoff of the transmission power is targeted, thereby avoiding the problem of poor communication quality caused by excessive backoff of some antennas on the multi-beam antenna during power backoff, and improving the communication quality after SAR backoff. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0011] Figure 2 It is a flow chart of the transmission power control method provided in the embodiment of the present application.

[0012] Figure 3 It is a structural schematic diagram of the transmission power control device provided in an embodiment of the present application.

[0013] Figure 4 It is a schematic diagram of the structure of the chip provided in the embodiment of the present application. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0015] With the development of electronic technology, electronic devices (such as mobile phones, tablet computers, etc.) are increasingly widely used. In addition to mobile calls, text messages and other communication services, electronic devices (such as mobile phones) can also be used for surfing the Internet, watching videos, playing games and other services. Therefore, the performance of the antenna of electronic devices has a key impact on the user experience.

[0016] In related technologies, in order to improve communication quality, multiple antennas are set in electronic devices, and the multiple antennas can be used to simultaneously receive antenna signals from different paths to select the best antenna signal. In some scenarios, the electronic device needs to switch antennas among the multiple antennas. For example, when the antenna of the electronic device is affected by the surrounding environment and the performance is degraded, the switching between antennas is usually achieved based on the received signal strength of the antenna, so as to switch to the antenna with the best reception quality to receive the signal.

[0017] In the related art, each of the multiple antennas can generate a beam with a fixed direction, and different antennas can generate beams with different fixed directions. In other words, each of the multiple antennas is a single-beam antenna. Therefore, the electronic device needs to be equipped with not only multiple antennas capable of generating different frequency bands, but also multiple antennas for the same frequency band or adjacent frequency bands, so as to realize antenna switching between different functions and switching of different antennas under the same function (that is, beams in different directions under the same communication function).

[0018] It should be noted that antenna switching between different functions is, for example, switching a Bluetooth antenna to a GPS antenna. Switching of different antennas under the same function can be, for example, in a call scenario, if the signal quality of antenna 1 being used deteriorates, this may be due to obstruction in the direction of the beam generated by antenna 1. In order to improve the communication quality, the current call service can be switched from antenna 1 to antenna 2. Antenna 2 is also an antenna that can meet the communication service. The difference is that the beam direction generated by antenna 2 is different from that generated by antenna 1. By switching antenna 1 to antenna 2, the call quality can be guaranteed.

[0019] Generally speaking, in the process of communicating using the beam generated by each antenna, the electromagnetic radiation of the beam will affect the user's physical safety. SAR standards are generally used internationally to limit the electromagnetic radiation of electronic equipment. Among them, SAR is defined as: the electromagnetic power absorbed or consumed by a unit mass of living organism (for example, human body) tissue under the action of an external electromagnetic field, in units of W / kg. In order to protect the health of living organisms, it is necessary to detect the status of electronic devices and users. Living organisms are conductors. When the conductors on the living organism and the electronic device are close, the capacitance value sensed by the conductor in the electronic device will change. The proximity of the living organism is detected by detecting the capacitance change of the conductor of the electronic device.

[0020] Specifically, when the distance between the working antenna in the electronic device and the person reaches the set threshold, it can be considered that the SAR of the beam generated by the working antenna in the electronic device reaches the SAR threshold specified by the SAR standard. At this time, in order to ensure that the SAR performance of the electronic device can meet the SAR standard (or avoid SAR exceeding the standard), the transmission power of the beam of the working antenna is usually controlled to fall back according to the set back-off value. The set back-off value is usually set for a single antenna.

[0021] As mentioned above, the antennas in the related art are all single-beam antennas. Therefore, the methods of controlling the transmit power backoff of the beam considering SAR performance (SAR power backoff for short) in the related art are all for single-beam antennas. However, with the multi-functional requirements of users for electronic devices, electronic devices with multi-beam antennas have gradually emerged. A multi-beam antenna can be understood as an antenna that can generate multiple beams, and the directions of the multiple beams generated by one antenna can be different.

[0022] For ease of understanding, the following Figure 1 An electronic device including a multi-beam antenna provided in an embodiment of the present application is introduced by way of example.

[0023] The embodiments of the present application do not specifically limit the type of electronic device, as long as the electronic device is internally provided with a multi-beam antenna for communication. For example, the electronic device may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a learning machine or an electronic dictionary and a smart watch and other terminal devices.

[0024] See Figure 1 , the electronic device 1 includes an antenna assembly 10 and a control unit 20.

[0025] The antenna assembly 10 may include a first antenna 11 and a second antenna 12. The first antenna 11 is a multi-beam antenna, that is, the first antenna 11 is used to generate multiple beams.

[0026] The first antenna 11 may include a first radiator 110 , a first feed source 120 , and M switching circuits 130 .

[0027] The first radiator 110 may also be referred to as a first radiating branch. The first radiator 110 has a first ground terminal 111, a first free terminal 112, a first feeding point 113, and M control points 114. The first feeding point 113 and the M control points 114 are both located between the first ground terminal 111 and the first free terminal 112. The first ground terminal 111 is connected to a ground GND1. The ground GND1 may be, for example, a floor. Each of the M control points 114 is located at a different position of the first radiator 110.

[0028] The first feed source 120 may include but is not limited to a radio frequency transceiver chip and a radio frequency front-end circuit in the electronic device 10. The first feed source 120 is connected to the first feeding point 113, and the first feed source 120 may be disposed on the main board of the electronic device 300 and the first feed source 120 may excite the first radiator 110 to generate a resonant current.

[0029] The M switch circuits 130 are connected to the M control points 114 in a one-to-one correspondence. Each of the M switch circuits 130 may include a regulating circuit and a switch 132 that controls whether the regulating circuit is working. The regulating circuit may include any combination of electronic components such as capacitors, inductors and / or resistors. Among them, the resistor may be a short-circuited conductive line. The electronic components specifically included in the regulating circuit can be set according to the application scenario and user needs. Exemplarily, for each switch circuit 130, its corresponding switch 132 is respectively connected to the control point 114 and the regulating circuit. When the switch 132 is closed, the control point 114 is connected to the regulating circuit. When the switch 132 is disconnected, the control point 114 is equivalent to having no connection to the regulating circuit. The switches in the M switch circuits 130 are S11-S1m respectively.

[0030] In the embodiment of the present application, by setting different regulating circuits in the M switch circuits 130 and controlling the opening and closing states of the switches S11-S1m respectively, each of the M control points 114 can be made to form any one of the states of open circuit connection, short circuit connection, capacitive load, inductive load, etc. Among them, the states of every two control points 114 can be different or the same.

[0031] That is to say, the state of the switches S11-S1m can determine the frequency band generated by the first antenna 11 and the direction of the beam in the frequency band. Based on this, the switches S11-S1m in the embodiment of the present application can form multiple state combinations, where each state combination corresponds to an operating frequency band and a beam of the antenna 1. Therefore, the first antenna can generate multiple beams, and each of the multiple beams has a different direction. In some embodiments, the beam can also be called a directional pattern.

[0032] The control unit 20 is connected to the M switch circuits 130, and the control unit 20 can generate a control instruction to control the switch to be controlled to a predetermined state. The switch to be controlled includes the switches in the above-mentioned M switch circuits 130. The predetermined state is the closed state of each switch in one of the above-mentioned multiple state combinations. Specifically, the control unit 20 is configured with a built-in algorithm and a control strategy, and the built-in algorithm and the control strategy are both used to instruct the control unit 20 to control the switch to be controlled to a predetermined state according to the input information, so as to switch the first antenna 11 to generate the currently used beam. The currently used beam has a preset direction, and the currently used beam is one of the multiple beams generated by the first antenna 11 mentioned above.

[0033] The input information is used to indicate the current application scenario of the electronic device. In some embodiments, the input information may come from information from a processor and / or a sensor, for example. The current application scenario may be, for example, a communication scenario such as a mobile call or text message, or a scenario such as surfing the Internet, watching videos, or playing games. The current application scenario of the electronic device may indicate the current gripping posture of the electronic device and the distance between the living being and the electronic device. For example, the current gripping posture of the electronic device may be a vertical grip or a horizontal grip.

[0034] In some embodiments, the second antenna 12 may be a multi-beam antenna, that is, the second antenna 12 is also used to generate multiple beams. The specific number of the multiple beams generated by the second antenna 12 may be the same as or different from the specific number of the multiple beams generated by the first antenna 11.

[0035] like Figure 1 As shown, the second antenna 12 may include a second radiator 140 , N switch circuits 150 , and a second feed source 160 .

[0036] The second radiator 140 has a second ground terminal 141, a second free terminal 142, a second feeding point 143 and N control points 144. The second feeding point 143 and the N control points 144 are located between the second ground terminal 141 and the second free terminal 142. The second ground terminal 141 is connected to a ground GND2. The ground GND2 can be, for example, a floor. Each of the N control points 144 is located at a different position of the second radiator 140.

[0037] One end of the N switch circuits 150 is connected to the N control points 144 in a one-to-one correspondence, and the other end is connected to the control unit 12, and the control unit 12 can control the switch state in the N switch circuits 150. Specifically, each of the N switch circuits 150 may include a regulating circuit and a switch 152 that controls whether the regulating circuit works. The regulating circuit may include any combination of electronic components such as capacitors, inductors and / or resistors. Among them, the resistor may include a conductive wire that can form a short circuit. The electronic components specifically included in the regulating circuit can be set according to the application scenario and user needs. Exemplarily, for each switch circuit 150, its corresponding switch 152 is respectively connected to the control point 144 and the regulating circuit, when the switch 152 is closed, the control point 144 is connected to the regulating circuit, and when the switch 152 is disconnected, the control point 144 is equivalent to not connecting the regulating circuit (i.e., disconnecting the circuit). The switches in the N switch circuits 150 may be switches S21-S2n in sequence.

[0038] The state of the switches S21-S2n can determine the frequency band generated by the second antenna 12 and the direction of the beam in the frequency band. Based on this, the switches S21-S2n in the embodiment of the present application can form a plurality of state combinations, wherein each state combination corresponds to a working frequency band and a beam of the second antenna 12, and therefore, the second antenna 12 can generate a plurality of beams, each of which has a different direction. In some embodiments, the beam can also be referred to as a directional pattern.

[0039] The second feed source 160 is connected to the second feeding point 143 and is used to excite the second radiator 140 to generate a resonant current.

[0040] In some embodiments, there is a gap 145 between the second free end and the first free end 112, and the second radiator 140 is formed as a scatterer of the first antenna 11 through the gap 145, thereby increasing the number of frequency bands and / or the number of beams that can be generated by the first antenna 11, that is, increasing the diversity of the beams formed by the first antenna 11.

[0041] In some embodiments, the antenna assembly 10 may further include other antennas other than the first antenna and the second antenna, for example, a third antenna and / or a fourth antenna, etc. The embodiment of the present application does not specifically limit the number of antennas included in the antenna assembly 10, and the antenna assembly 10 may be designed according to actual needs.

[0042] By setting the multi-beam antenna (the first antenna 11 and / or the second antenna 12) as described above, the multi-beam antenna can be switched between different beams of one antenna, so one multi-beam antenna can achieve the role of multiple single-beam antennas in the related art. Compared with the single-beam antenna in the related art, the multi-beam antenna can be more beneficial to electronic devices with a smaller clearance area, and the switching requirements of different scenarios can be achieved by using fewer antennas, which can reduce costs and avoid interference between antennas, effectively improving the user experience.

[0043] Therefore, how to perform SAR power backoff for the above-mentioned multi-beam antenna has become an urgent problem to be solved.

[0044] As a possible implementation method, the SAR power backoff method for the single-beam antenna described above can be applied to the multi-beam antenna. Specifically, a backoff value is set for each antenna, and when the distance between the electronic device and the human body reaches the trigger threshold, the transmit power of the working antenna is backed off according to the backoff value, where the transmit power after backoff = the transmit power before backoff - the backoff value.

[0045] However, since the backoff value set in the single-beam antenna is for a single antenna, when it is applied to the multi-beam antenna, no matter which beam in the single multi-beam antenna is currently in use, it is backed off according to the backoff value set for the single multi-beam antenna. However, the SAR of each beam in the multi-beam antenna may be different when the distance between the user and the beam is the same. Therefore, if a one-size-fits-all backoff is performed according to the set backoff value, the following problems will occur: some beams have too much backoff power, resulting in poor communication quality.

[0046] In order to solve the above problems, an embodiment of the present application proposes a method for controlling transmission power, which can control the backoff of the transmission power of the currently used beam based on the beam mapping table set in the electronic device, so that the SAR of the currently used beam meets the standard. Among them, the beam mapping table includes multiple preset power backoff values ​​corresponding to the multiple beams generated by the first antenna included in the electronic device. Due to the existence of the beam mapping table, the power backoff of the transmission power is targeted, thereby avoiding the problem of poor communication quality caused by excessive backoff of some antennas on the multi-beam antenna during power backoff, and improving the communication quality after SAR backoff.

[0047] It should be noted that the method in the embodiment of the present application can be applied to the electronic device described above. As described above, the electronic device includes a first antenna and the first antenna is used to generate multiple beams. In the embodiment of the present application, a beam mapping table is provided in the electronic device. The beam mapping table is used to indicate the preset power backoff values ​​corresponding to each beam of each multi-beam antenna. For example, when the electronic device includes the first antenna and the second antenna described above, the beam mapping table includes a plurality of preset power backoff values ​​corresponding one-to-one to the multiple beams generated by the first antenna and / or a plurality of preset power backoff values ​​corresponding one-to-one to the multiple beams generated by the second antenna.

[0048] Exemplarily, the content of the beam mapping table is shown in Table 1. In which, antenna 1 represents the first antenna in the foregoing text, antenna 2 represents the second antenna in the foregoing text, and antenna n can be other antennas. Figure 1 As shown, the beam mapping table includes a plurality of preset power back-off values ​​corresponding one-to-one to the plurality of beams generated by the first antenna. Optionally, the beam mapping table also includes a plurality of SAR values ​​corresponding one-to-one to the plurality of beams generated by the first antenna.

[0049] Table 1

[0050] Beam SAR value Preset power fallback value Antenna 1 beam 1 SAR11,… PB11 Antenna 1 beam 2 SAR12,… PB12 Antenna 1 beam 3 SAR13,… PB13 Antenna 2 beam 1 SAR21,… PB21 … … … Beam n of antenna n SARnn,… PB

[0051] As shown in Table 1, the multiple beams generated by the multi-beam antenna 1 include beam 1 of antenna 1, beam 2 of antenna 1, and beam 3 of antenna 1. Among them, the radiation directions of beam 1 of antenna 1, beam 2 of antenna 1, and beam 3 of antenna 1 are different and their corresponding SAR values ​​and preset power backoffs are different. For example, the radiation direction of beam 1 of antenna 1 may be upward, the radiation direction of beam 2 of antenna 1 may be rightward, and the radiation direction of beam 3 of antenna 1 may be downward. Specifically, the SAR value corresponding to beam 1 of antenna 1 is SAR11, ..., and the preset power backoff value corresponding to beam 1 of antenna 1 is PB11. The SAR and preset power backoff values ​​corresponding to other beams are similar to this and will not be repeated here.

[0052] For the electronic device provided with the above beam mapping table, the following is combined with Figure 2 The transmission power control method 200 in the embodiment of the present application is described in detail. Figure 2 As shown, method 200 may include step S210.

[0053] In step S210: the transmission power backoff of the currently used beam is controlled according to the beam mapping table, so that the SAR of the currently used beam meets the standard.

[0054] The currently used beam is one of the multiple beams generated by the first antenna. For example, for the multiple beams generated by the first antenna (i.e., antenna 1) in Table 1, including beam 1, beam 2, and beam 3, the currently used beam can be any one of beam 1, beam 2, and beam 3.

[0055] In some embodiments, step S210 specifically includes the following contents: receiving indication information and, in response to the indication information, controlling the transmission power backoff of the currently used beam according to the beam mapping table so that the SAR of the currently used beam meets the standard.

[0056] The indication information is used to indicate that the first antenna needs to perform Specific Absorption Rate (SAR) power backoff, that is, considering that SAR may exceed the standard, the transmission power of the currently used beam of the first antenna needs to be backed off.

[0057] In some embodiments, the indication information may be obtained based on the distance between the user and the electronic device monitored by the distance sensor. For example, when the distance between the user and the electronic device monitored by the distance sensor is less than a set threshold, the indication information may be obtained.

[0058] Optionally, the indication information may also be obtained according to the service type and service scenario of the electronic device. For example, when the electronic device uses a voice call service and the hands-free function is not turned on and the earphone is not inserted, the indication information may be obtained.

[0059] The embodiments of the present application do not impose any specific limitation on the specific method of controlling the transmit power backoff of the currently used beam according to the beam mapping table, as long as the transmit power backoff of the currently used beam is controlled according to the information in the beam mapping table.

[0060] As an implementation method, the transmit power backoff of the currently used beam can be controlled at an instant according to the beam mapping table. Specifically, controlling the transmit power backoff of the currently used beam according to the beam mapping table includes: determining the target power backoff value of the currently used beam according to the beam mapping table; and controlling the transmit power backoff of the currently used beam according to the target power backoff value.

[0061] The target power backoff value of the currently used beam is used to characterize how much the currently used beam needs to back off from the transmit power before backoff. In view of this, controlling the transmit power backoff of the currently used beam according to the target power backoff value can be: using the transmit power of the currently used beam before backoff minus the target power backoff value as the transmit power of the currently used beam after backoff, and thereby controlling the backoff of the transmit power of the currently used beam.

[0062] In some embodiments, the target power backoff value of the currently used beam is the same regardless of whether the currently used beam is beam 1, beam 2 or beam 3 of the first antenna. However, even if the target power backoff value is the same, the target power backoff value in the embodiment of the present application is still determined by combining the corresponding preset power backoff values ​​of beam 1, beam 2 and beam 3 of the first antenna in the beam mapping table.

[0063] As an implementation method, determining the target power backoff value of the currently used beam according to the beam mapping table includes: determining the maximum preset power backoff value among multiple preset power backoff values ​​corresponding to multiple beams of the first antenna in the beam mapping table as the target power backoff value of the currently used beam. Taking the beam mapping table in Table 1 as an example, the target power backoff value of the currently used beam is max(PB11, PB12, PB13).

[0064] In other embodiments, when the currently used beam is beam 1, beam 2 or beam 3 of the first antenna, the target power backoff value of the currently used beam is different, and the target power backoff value of the currently used beam is also obtained according to the beam mapping table.

[0065] As an implementation method, determining the target power backoff value of the currently used beam according to the beam mapping table includes: determining the preset power backoff value corresponding to the currently used beam in the beam mapping table as the target power backoff value of the currently used beam. Taking the beam mapping table in Table 1 as an example, if the currently used beam is beam 2 of antenna 1, its corresponding preset power backoff value PB12 is used as the target power backoff value. If the currently used beam is beam 3 of antenna 1, its corresponding preset power backoff value PB13 is used as the target power backoff value. If the currently used beam is other beams, the method for determining the target power backoff value is similar to the above method and will not be repeated here.

[0066] As mentioned above, the embodiment of the present application does not specifically limit the specific method of controlling the transmission power backoff of the currently used beam according to the beam mapping table. As another implementation method, the transmission power of the currently used beam can be controlled by dynamic adjustment. Dynamic adjustment can be understood as performing different power backoff controls on the transmission power of the currently used beam at multiple moments in the first time period. In other words, at the first moment, the transmission power of the currently used beam (for example, beam 1 of antenna 1) is backed off according to the backoff value 1, and at the second moment, the transmission power of the currently used beam (for example, beam 2 of antenna 1) is backed off according to the backoff value 2. Backoff value 1 and backoff 2 may be different. It should be noted that the first time period is the time period for communication using the currently used beam.

[0067] Specifically, controlling the transmit power backoff of the currently used beam according to the beam mapping table includes: determining the allowable value of the transmit power of the currently used beam after backoff according to the beam mapping table; and dynamically controlling the transmit power backoff of the currently used beam according to the allowable value of the transmit power of the currently used beam after backoff within a first time period, wherein the average value of the actual value of the transmit power of the currently used beam after backoff within the first time period is less than or equal to the allowable value of the transmit power of the currently used beam after backoff. Preferably, after dynamically controlling the transmit power backoff of the currently used beam, the average value of the actual value of the transmit power of the currently used beam after backoff within the first time period is equal to the allowable value of the transmit power of the currently used beam after backoff.

[0068] The allowed value of the transmit power of the currently used beam after backoff is used as a limit for dynamically adjusting the transmit power of the currently used beam. Specifically, the allowed value of the transmit power of the currently used beam after backoff is limited to the average value of the actual power of the transmit power of the currently used beam during the first time period of using the currently used beam, so that the electromagnetic wave radiation of the currently used beam meets the SAR standard.

[0069] Among them, determining the allowed value of the transmit power of the currently used beam after fallback according to the beam mapping table includes: determining the target power backoff value of the currently used beam according to the beam mapping table; determining the difference between the allowed maximum transmit power and the target power backoff value as the allowed value of the transmit power of the currently used beam after fallback.

[0070] Among them, the specific method of determining the target power backoff value of the currently used beam according to the beam mapping table is as described above. It will not be repeated here. As mentioned above, no matter which beam is currently used in the first antenna, the target power backoff value of the currently used beam can be max (PB11, PB12, PB13) or the target power backoff value of the currently used beam can be the preset power backoff value corresponding to the currently used beam in the beam mapping table.

[0071] The maximum allowed transmit power may be understood as the maximum transmit power that can be obtained by the antenna port. In some embodiments, the maximum allowed transmit power may be a fixed value.

[0072] Corresponding to the target power backoff value which can be the above two cases, there can also be two allowed values ​​of the transmit power of the currently used beam after backoff. If the target power backoff value is max(PB11, PB12, PB13), then the allowed value of the transmit power of the currently used beam after backoff = allowed maximum transmit power - max(PB11, PB12, PB13). If the target power backoff value is the target power backoff value of the currently used beam, which can be the preset power backoff value corresponding to the currently used beam in the beam mapping table, then the allowed value of the transmit power of the currently used beam after backoff = allowed maximum transmit power - preset power backoff value corresponding to the currently used beam. For example, if the currently used beam is beam 2 of antenna 1, then the allowed value of the transmit power of the currently used beam after backoff = allowed maximum transmit power - PB12.

[0073] It should be understood that in the first time period as described above, dynamically controlling the transmission power backoff of the currently used beam according to the allowed value of the transmission power of the currently used beam after backoff means controlling the average value of the actual value of the transmission power of the currently used beam after backoff in the first time period to be equal to the allowed value of the transmission power of the currently used beam after backoff. However, at a certain moment in the first time period, the actual value of the transmission power of the currently used beam after backoff may be greater than the allowed value of the transmission power of the currently used beam after backoff.

[0074] The method for controlling the transmission power in the embodiment of the present application is performed on a beam mapping table. Since the beam mapping table takes into account the SAR of different beams and the different predetermined power back-off values, compared to the direct use of the transmission power back-off method of a single-beam antenna, the method in the embodiment of the present application can avoid the problem of poor communication quality caused by excessive back-off of some antennas on a multi-beam antenna during power back-off, thereby improving the communication quality after SAR back-off.

[0075] Combination of the above Figure 1 to Figure 2 The method embodiment of the present application is described in detail. Figure 3-Figure 4 The device embodiment of the present application is described in detail. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment, so the parts not described in detail can refer to the previous method embodiment.

[0076] like Figure 3 As shown, a transmission power control device 300 provided in an embodiment of the present application. The device 300 is applied to the electronic device described above. As described above, the electronic device includes a first antenna, the first antenna is used to generate multiple beams, and a beam mapping table is provided in the electronic device, and the beam mapping table includes multiple preset power backoff values ​​corresponding to the multiple beams.

[0077] See Figure 3,The transmission power control device 300 includes a control module 310.

[0078] The control module 310 is used to control the transmission power backoff of the currently used beam according to the beam mapping table in response to the power backoff indication information so that the SAR of the currently used beam meets the standard, and the currently used beam is one of the multiple beams generated by the first antenna.

[0079] Optionally, the control module 310 is used to determine a target power backoff value of the currently used beam according to the beam mapping table; and control the transmit power backoff of the currently used beam according to the target power backoff value.

[0080] Optionally, the control module 310 is used to determine the allowed value of the transmission power of the currently used beam after fallback according to the beam mapping table; within a first time period, dynamically control the transmission power fallback of the currently used beam according to the allowed value of the transmission power of the currently used beam after fallback, wherein the average value of the actual value of the transmission power of the currently used beam after fallback within the first time period is less than or equal to the allowed value of the transmission power of the currently used beam after fallback, and the first time period is a time period for communication using the currently used beam.

[0081] Optionally, the control module 310 is used to determine the target power backoff value of the currently used beam according to the beam mapping table; and determine the difference between the maximum allowed transmit power and the target power backoff value as the allowed value of the transmit power of the currently used beam after the backoff.

[0082] Optionally, the control module 310 is used to determine the maximum preset power backoff value among the multiple preset power backoff values ​​corresponding to the multiple beams of the first antenna in the beam mapping table as the target power backoff value of the currently used beam.

[0083] Optionally, the control module 310 is configured to determine a preset power backoff value corresponding to the currently used beam in the beam mapping table as a target power backoff value of the currently used beam.

[0084] Optionally, the beam mapping table also includes multiple SARs corresponding one-to-one to the multiple beams.

[0085] Optionally, the control module 310 is used to receive indication information and respond to the power backoff indication information to control the transmission power backoff of the currently used beam according to the beam mapping table, wherein the indication information is used to indicate that the first antenna needs to perform Specific Absorption Rate (SAR) power backoff.

[0086] Optionally, the first antenna includes a first radiator, a first feed source and M switching circuits, the first radiator has a first ground end, a first free end, a first feeding point and M control points, the first feeding point and the M control points are both located between the first ground end and the first free end, the first feed source is connected to the first feeding point, the first feed source excites the first radiator to produce resonance, the M switching circuits are connected to the M control points in a one-to-one correspondence, the switches in the M switching circuits control the first antenna to generate the multiple beams, the control module 310 is also used to control the switch to be controlled to a predetermined state according to the input information, so as to switch the first antenna to generate the currently used beam, the currently used beam is one of the multiple beams, and the currently used beam has a preset direction, the switch to be controlled includes a switch in the M switching circuits, and the input information is used to indicate the current application scenario of the electronic device.

[0087] like Figure 4 As shown, a chip 400 is also provided in an embodiment of the present application. The chip 400 includes a processor 410, which can be used to call and run a computer program from a memory, so that a device equipped with the chip performs the method described in the above method embodiment. It is understandable that the processor 410 can be any type of processor mentioned above. It is understandable that the memory can be independent of the chip or integrated in the chip.

[0088] The embodiment of the present application also provides a machine-readable storage medium for storing a program, and the program enables a computer to execute the method in each embodiment of the present application.

[0089] The embodiment of the present application also provides a computer program product. The computer program product includes a program. The program enables a computer to execute the method in each embodiment of the present application.

[0090] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present disclosure is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a machine-readable storage medium, or transmitted from one machine-readable storage medium to another machine-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The machine-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0091] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments of the present disclosure can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present disclosure.

[0092] In the several embodiments provided in the present disclosure, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0093] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0094] In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0095] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A method for controlling transmission power, characterized in that: The method is applied to an electronic device, the electronic device includes a first antenna, the first antenna is used to generate multiple beams, a beam mapping table is provided in the electronic device, the beam mapping table includes multiple preset power backoff values ​​corresponding to the multiple beams one by one, and the method includes: The transmission power backoff of a currently used beam is controlled according to the beam mapping table so that the SAR of the currently used beam meets the standard, and the currently used beam is one of the multiple beams generated by the first antenna.

2. The method according to claim 1, characterized in that The controlling the transmit power backoff of the currently used beam according to the beam mapping table comprises: Determine a target power backoff value of the currently used beam according to the beam mapping table; The transmit power backoff of the currently used beam is controlled according to the target power backoff value.

3. The method according to claim 1, characterized in that The controlling the transmit power backoff of the currently used beam according to the beam mapping table comprises: Determining an allowable value of the transmit power of the currently used beam after fallback according to the beam mapping table; During a first time period, the transmission power backoff of the currently used beam is dynamically controlled based on the allowed value of the transmission power of the currently used beam after the backoff, wherein an average value of actual values ​​of the transmission power of the currently used beam after the backoff during the first time period is less than or equal to the allowed value of the transmission power of the currently used beam after the backoff, and the first time period is a time period for communication using the currently used beam.

4. The method according to claim 3, characterized in that The determining, according to the beam mapping table, an allowable value of the transmit power of the currently used beam after fallback comprises: Determine a target power backoff value of the currently used beam according to the beam mapping table; The difference between the allowed maximum transmit power and the target power backoff value is determined as the allowed value of the transmit power of the currently used beam after the backoff.

5. The control method according to claim 2 or 4, characterized in that: Determining the target power backoff value of the currently used beam according to the beam mapping table includes: The maximum preset power backoff value among the plurality of preset power backoff values ​​corresponding to the plurality of beams of the first antenna in the beam mapping table is determined as the target power backoff value of the currently used beam.

6. The control method according to claim 2 or 4, characterized in that: Determining the target power backoff value of the currently used beam according to the beam mapping table includes: A preset power backoff value corresponding to the currently used beam in the beam mapping table is determined as a target power backoff value of the currently used beam.

7. The control method according to claim 1, characterized in that: The beam mapping table also includes a plurality of SARs corresponding one-to-one to the plurality of beams.

8. The control method according to claim 1, characterized in that: The controlling the transmit power backoff of the currently used beam according to the beam mapping table comprises: Receiving indication information, where the indication information is used to indicate that the first antenna needs to perform specific absorption rate (SAR) power backoff; In response to the indication information, the transmit power backoff of the currently used beam is controlled according to the beam mapping table.

9. A transmission power control device, characterized in that: The device is applied to an electronic device, the electronic device includes a first antenna, the first antenna is used to generate multiple beams, a beam mapping table is provided in the electronic device, the beam mapping table includes multiple preset power backoff values ​​corresponding to the multiple beams one by one, and the device includes: A control module is used to control the transmission power backoff of the currently used beam according to the beam mapping table so that the SAR of the currently used beam meets the standard, and the currently used beam is one of the multiple beams generated by the first antenna.

10. A chip, characterized in that: include: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 8.

11. A computer-readable storage medium having executable code stored thereon, characterized in that: The code is used to implement the method according to any one of claims 1 to 8.

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