Method and apparatus for determining maximum transmission power

Abstract

This application relates to the field of communications, and provides a method and device for determining the maximum transmit power. The method includes: determining the current communication state; determining P1 according to the current communication state, where P1 is the power after subtracting the first power back-off from the maximum transmit power of the electronic device in the preset communication state; obtaining P2, P3, and P4, where P2 is the maximum transmit power that satisfies the SAR back-off requirement of the electronic device in the preset communication state, P3 is the transmit power fluctuation value of the electronic device in the preset communication state, and P4 is the transmit power fluctuation value of the electronic device in the current communication state; when P2 + P3 < P1 + P4, determining the maximum transmit power as P2 - [(P1 + P4) - (P2 + P3)], and when P2 + P3 ≥ P1 + P4, determining the maximum transmit power as the smaller one of P1 and P2. This method can improve the coverage range of wireless signals while meeting the SAR regulations and MPR regulations.

Description

Technical Field

[0001] This application relates to the field of communications, and in particular, to a method and apparatus for determining the maximum transmit power. Background Art

[0002] An electronic device can transmit data through a wireless signal. To improve the coverage range of the wireless signal, the electronic device can increase the transmit power of the wireless signal. However, an excessive transmit power can cause harm to the user's physical health. Therefore, the electronic device usually needs to perform a specific absorption rate (SAR) back-off based on the maximum transmit power to make the SAR of the wireless signal comply with legal regulations.

[0003] According to the regulations of the communication protocol, the electronic device also needs to perform a maximum power reduction (MPR) when transmitting data through a wireless signal. When the SAR back-off and the MPR are inconsistent, usually the larger value is taken for back-off. For example, when the SAR back-off in a certain communication state is 2 dB and the MPR in this communication state is 1 dB, the electronic device usually takes 2 dB as the power back-off amount.

[0004] Due to manufacturing process factors, there is a certain fluctuation in the transmit power of the electronic device. For example, if the ideal maximum transmit power of the electronic device is 23 dB and the power fluctuation value is 1 dB, the actual maximum transmit power of the electronic device can reach 24 dB. Therefore, the power fluctuation value also needs to be considered when setting the SAR back-off amount.

[0005] The power fluctuation values in different communication states are different. One method for determining the maximum transmit power considering the power fluctuation value is to determine the actual maximum transmit power based on the maximum power fluctuation value. For example, in some electronic products produced on a production line, the power fluctuation value corresponding to the quadrature phase shift keying (QPSK) mode is 1 dB, and the power fluctuation value corresponding to the 16 quadrature amplitude modulation (QAM) mode is 1.5 dB. When determining the actual maximum transmit power of these electronic products, 1.5 dB needs to be considered, that is, a back-off of 2.5 dB (2 dB + (1.5 dB - 1 dB)) is performed on the basis of 23 dB to make the actual maximum transmit power meet the SAR back-off requirements and the MPR requirements.

[0006] However, the above method will cause the power back-off amount to be too large in the mode with a small power fluctuation value (for example, the power fluctuation value of the QPSK mode is small, and only a back-off of 2 dB is required to meet the SAR requirements), resulting in a reduction in the coverage range of the wireless signal and affecting the user's call experience. Summary of the Invention

[0007] An embodiment of the present application provides a method and device for turning on a low-noise amplifier, which can avoid excessive power back-off in a mode with a small power fluctuation value, and improve the coverage of wireless signals while meeting the SAR regulations and MPR regulations.

[0008] In a first aspect, a method for determining the maximum transmit power is provided. The method includes: an electronic device determines the current communication state; the electronic device determines P1 according to the current communication state, where P1 is the power after the first power back-off from the maximum transmit power of the electronic device in a preset communication state, and the first power back-off is the larger of the SAR back-off in the preset communication state and the MPR in the current communication state, and the preset communication state is a communication state where the MPR is 0; the electronic device obtains P2, P3, and P4, where P2 is the maximum transmit power of the electronic device that meets the SAR back-off requirement in the preset communication state, P3 is the transmit power fluctuation value of the electronic device in the preset communication state, and P4 is the transmit power fluctuation value of the electronic device in the current communication state; the electronic device determines the maximum transmit power in the current communication state according to the magnitude relationship between P2 + P3 and P1 + P4. Wherein, when P2 + P3 < P1 + P4, the electronic device determines that the maximum transmit power in the current communication state is P2 - [(P1 + P4) - (P2 + P3)], and when P2 + P3 ≥ P1 + P4, the electronic device determines that the maximum transmit power in the current communication state is the smaller of P1 and P2.

[0009] The communication state is related to the modulation mode and the transmission bandwidth configuration, and the MPR corresponding to different communication states is different. The MPR of the preset communication state is 0. Under the condition that other conditions are the same, the maximum transmission power of the preset communication state is the highest. Therefore, the preset communication state can be used as a reference state to determine the maximum transmission power of the current communication state, so as to avoid the maximum transmission power of the current communication state exceeding the power upper limit specified by SAR. Based on the SAR back-off of the preset communication state and the MPR of the current communication state, the initial transmission power P1 of the current communication state can be determined. Subsequently, the electronic device can obtain P2, P3, and P4, and determine the maximum transmission power in the current communication state according to the magnitude relationship between P2 + P3 and P1 + P4. If P2 + P3 < P1 + P4, it means that considering power fluctuations and MPR, the maximum transmission power of the current communication state exceeds the maximum transmission power of the preset communication state. The excess amount (i.e., [(P1 + P4) - (P2 + P3)]) can be subtracted from the maximum transmission power (P2) that meets the SAR requirements in the preset communication state, so as to obtain the final transmission power of the current communication state. If P2 + P3 ≥ P1 + P4, it means that considering power fluctuations and MPR, the maximum transmission power of the current communication state does not exceed the maximum transmission power of the preset communication state. A smaller value selected from P1 and P2 can be used as the final transmission power of the current communication state. The above solution comprehensively considers the MPR and the power fluctuation value of the current communication state when calculating the maximum transmission power. The communication state with a larger MPR has a smaller SAR back-off amount, and the communication state with a smaller MPR has a larger SAR back-off amount. The communication state with a larger power fluctuation value has a larger SAR back-off amount, and the communication state with a smaller power fluctuation value has a smaller SAR back-off amount. It can enable different communication states to improve the maximum transmission power as much as possible while meeting the SAR back-off requirements and MPR requirements, thereby improving the coverage range of wireless signals.

[0010] Optionally, the electronic device determines the current communication state, including: the electronic device obtains PUSCH configuration information; the electronic device determines the current communication state according to the PUSCH configuration information, and the PUSCH configuration information includes the current modulation mode and the current transmission bandwidth configuration.

[0011] The measured power value of PUSCH is closer to the calculated power value. Therefore, applying the above solution in the communication scenario of PUSCH can reduce the probability that the actual transmission power of the wireless signal exceeds the SAR regulation due to errors.

[0012] Optionally, the current transmission bandwidth configuration includes: frequency band and number of resource blocks. [[ID=:10]]

[0013] Optionally, the electronic device determines the maximum transmit power in the current communication state according to the magnitude relationship between P2 + P3 and P1 + P4, including: when P4 > P3, the electronic device determines the maximum transmit power in the current communication state according to the magnitude relationship between P2 + P3 and P1 + P4.

[0014] When P4 > P3, it indicates that the power fluctuation value in the current communication state is larger than the power fluctuation value in the preset communication state, and the maximum transmit power in the current communication state may exceed the maximum transmit power in the preset communication state. At this time, it is necessary to further determine whether the maximum transmit power in the current communication state exceeds the maximum transmit power in the preset communication state based on the magnitude relationship between P2 + P3 and P1 + P4. If it exceeds, the SAR back-off amount is increased, so as to ensure that the maximum transmit power in the current communication state does not exceed the SAR requirement.

[0015] Optionally, the method further includes: when P4 ≤ P3, the electronic device determines that the maximum transmit power in the current communication state is the smaller one of P1 and P2.

[0016] When P4 > P3, it indicates that the power fluctuation value in the current communication state is less than or equal to the power fluctuation value in the preset communication state, and the maximum transmit power in the current communication state will not exceed the maximum transmit power in the preset communication state. A smaller value can be directly selected from P1 and P2 as the maximum transmit power in the current communication state, so as to ensure that the maximum transmit power in the current communication state does not violate the SAR requirement.

[0017] Optionally, after the electronic device determines the maximum transmit power in the current communication state, the method further includes: the electronic device determines whether to shut down; when the electronic device determines that it has not shut down, the electronic device obtains the communication state at the next moment; when the communication state at the next moment is different from the current communication state, the electronic device determines P5 according to the communication state at the next moment, where P5 is the power after the second power back-off from the maximum transmit power of the electronic device in the preset communication state, and the second power back-off is the larger one of the SAR back-off in the preset communication state and the MPR in the communication state at the next moment; the electronic device obtains P2, P3, and P6, where P6 is the transmit power fluctuation value of the electronic device in the current communication state; when P2 + P3 < P5 + P6, the electronic device determines that the maximum transmit power in the communication state at the next moment is P2 - [(P5 + P6) - (P2 + P3)]; when P2 + P3 ≥ P5 + P6, the electronic device determines that the maximum transmit power in the communication state at the next moment is the smaller one of P5 and P2.

[0018] After determining the maximum transmit power in the current communication state, if the electronic device is not powered off, the electronic device can continue to monitor the communication state at the next moment. When the communication state at the next moment is different from the current communication state, the electronic device can continue to determine the maximum transmit power at the next moment to ensure that the maximum transmit power at the next moment does not violate the SAR requirement.

[0019] Optionally, the preset communication state is one of the following communication states: the modulation mode is QPSK, the transmission frequency band is 1.4 MHz, and the number of resource blocks is less than or equal to 5; the modulation mode is QPSK, the transmission frequency band is 3 MHz, and the number of resource blocks is less than or equal to 4; the modulation mode is QPSK, the transmission frequency band is 5 MHz, and the number of resource blocks is less than or equal to 8; the modulation mode is QPSK, the transmission frequency band is 10 MHz, and the number of resource blocks is less than or equal to 12; the modulation mode is QPSK, the transmission frequency band is 15 MHz, and the number of resource blocks is less than or equal to 16; the modulation mode is QPSK, the transmission frequency band is 20 MHz, and the number of resource blocks is less than or equal to 18.

[0020] In a second aspect, there is provided an apparatus for determining the maximum transmit power, including a unit for performing any of the methods in the first aspect. The apparatus may be a terminal device or a network device, or may be a chip within the terminal device or the network device. The apparatus may include an input unit and a processing unit.

[0021] When the apparatus is a terminal device or a network device, the processing unit may be a processor, and the input unit may be a communication interface; the terminal device or the network device may further include a memory for storing computer program code. When the processor executes the computer program code stored in the memory, the terminal device or the network device is caused to perform any of the methods in the first aspect.

[0022] When the apparatus is a chip within the terminal device or the network device, the processing unit may be a logic processing unit inside the chip, and the input unit may be an output interface, a pin, a circuit, etc.; the chip may further include a memory, which may be a memory within the chip (e.g., a register, a cache, etc.), or may be a memory located outside the chip (e.g., a read-only memory, a random access memory, etc.); the memory is used for storing computer program code. When the processor executes the computer program code stored in the memory, the chip is caused to perform any of the methods in the first aspect.

[0023] In a third aspect, there is provided a computer-readable storage medium storing computer program code, which when run by an apparatus for determining the maximum transmit power, causes the apparatus to perform any of the methods in the first aspect.

[0024] Fourthly, a computer program product is provided, which includes computer program code that, when run by a device for determining the maximum transmission power, causes the device to execute any of the methods in the first aspect. Description of the Drawings

[0025] Figure 1 is a schematic diagram of a communication system applicable to the present application;

[0026] Figure 2 is a schematic diagram of another communication system applicable to the present application;

[0027] Figure 3 is a schematic diagram of a basic wireless communication process applicable to the present application;

[0028] Figure 4 is a schematic diagram of a power back-off scenario provided by the present application without considering SAR back-off;

[0029] Figure 5 is a schematic diagram of a power back-off scenario provided by the present application considering SAR back-off;

[0030] Figure 6 is a schematic diagram of another power back-off scenario provided by the present application considering SAR back-off;

[0031] Figure 7 is a schematic diagram of a method for determining the maximum transmission power provided by the present application;

[0032] Figure 8 is the application Figure 7 of the schematic diagram of the power back-off scenario after the method shown;

[0033] Figure 9 is the application Figure 7 of the schematic diagram of another power back-off scenario after the method shown;

[0034] Figure 10 is a schematic diagram of another method for determining the maximum transmission power provided by the present application;

[0035] Figure 11 is a schematic diagram of yet another method for determining the maximum transmission power provided by the present application;

[0036] Figure 12 is a schematic diagram of a device for determining the maximum transmission power provided by the present application;

[0037] Figure 13 is a schematic diagram of a terminal device for determining the maximum transmission power provided by the present application;

[0038] Figure 14 This is a schematic diagram of a network device for determining the maximum transmission power provided by this application. Specific implementation manners

[0039] Next, the technical solutions in the embodiments of this application will be described with reference to the accompanying drawings.

[0040] First, the application scenario of this application will be introduced. Figure 1 This is a schematic diagram of a communication system applicable to this application.

[0041] The communication system 100 includes a network device 110 and a terminal device 120. The terminal device 120 communicates with the network device 110 through electromagnetic waves. That is, the terminal device 120 can send data to the network device 110, and the network device 110 can also send data to the terminal device 120.

[0042] In this application, the terminal device 120 may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices with wireless communication functions, such as user equipment (UE), mobile station (MS), soft terminal, home gateway, set-top box, wearable devices, etc. defined by the 3rd generation partnership project (3GPP).

[0043] As an example rather than a limitation, a wearable device can also be called a wearable intelligent device, which is a general term for devices developed by applying wearable technology to intelligentize daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. A wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable intelligent devices include those with complete functions and large sizes that can realize complete or partial functions without relying on a smart phone, such as smart watches or smart glasses, etc., and those that only focus on a certain type of application function and need to cooperate with other devices such as smart phones, such as various smart bracelets and smart jewelry for physical sign monitoring.

[0044] The network device 110 may be a base station defined by 3GPP, such as a new generation node B (gNB) in a new radio (NR) communication system. The network device 110 may also be a non-3GPP access network device, such as an access gateway (AGF). The network device may also be a relay station, access point, vehicle-mounted device, or other types of devices.

[0045] Figure 2 Another communication system applicable to the present application is shown.

[0046] In communication system 200, base station 210 is a form of network device 110, and UE1 to UE6 are six different forms of terminal device 120. Among them, UE1 is a communication device in a rail transit system, UE2 is a set-top box, UE3 is a smart fueling device or a smart charging pile, UE4 is a smart cup, UE5 is a mobile phone, and UE6 is a smart printer. A local area network can be formed among UE4, UE5, and UE6. At this time, UE5 can be used as the network device in the local area network, and UE4 and UE6 can be used as the terminal devices in the local area network.

[0047] Figure 1 and Figure 2 The communication system shown is only an example, and the communication system applicable to the present application is not limited thereto.

[0048] To facilitate the understanding of the technical solution of the present application, the technical features involved in the present application will be briefly introduced first.

[0049] Ⅰ. Modulation.

[0050] Figure 3 The basic process of wireless communication is shown.

[0051] After the information source at the sending end generates a baseband signal, the baseband signal is modulated by a transmitter, and finally a wireless signal is generated and transmitted to the receiving end. After receiving the wireless signal, the receiving end demodulates it through a receiver to restore it to the baseband signal, and the baseband signal is transmitted to the information sink to complete the communication.

[0052] The modulation experienced by the information transmitted on the wireless channel is also called band-pass modulation. The principle of band-pass modulation is to use a carrier for modulation, shift the frequency of the baseband signal to a higher frequency band, and convert the baseband signal (digital signal) into an analog signal, so that it can be better transmitted in an analog channel (wireless channel).

[0053] Common band-pass modulation methods include: amplitude modulation, frequency modulation, phase modulation, and QAM.

[0054] Amplitude modulation: That is, the amplitude of the carrier changes with the baseband digital signal. For example, 0 or 1 corresponds to no carrier or carrier output respectively.

[0055] Frequency modulation: That is, the frequency of the carrier changes with the baseband digital signal. For example, 0 or 1 corresponds to low frequency or high frequency respectively.

[0056] Phase modulation: That is, the initial phase of the carrier changes with the baseband digital signal. For example, 0 or 1 corresponds to a sine wave or a cosine wave respectively.

[0057] QPSK is a phase modulation method that defines 4 different phases, representing 00, 01, 10, and 11 respectively. Therefore, QPSK can modulate 2 bits of information on each carrier.

[0058] QAM (Frequency Modulation + Phase Modulation): It uses two independent baseband waveforms to perform double-sideband modulation of suppressed carriers on two mutually orthogonal carriers with the same frequency, and utilizes the property that the spectra of such modulated signals are orthogonal within the same bandwidth to achieve two-way parallel digital information transmission.

[0059] QAM includes 16QAM, 64QAM, and 256QAM. Among them, one symbol of 16QAM represents 4 bits, one symbol of 64QAM represents 6 bits, and one symbol of 256QAM represents 8 bits.

[0060] Ⅱ, Resource Block (RB).

[0061] Signal transmission requires occupying transmission resources (such as time domain resources and frequency domain resources). The communication protocol divides the transmission resources into resource blocks (RBs) to facilitate the flexible use of transmission resources by the sending end.

[0062] For example, 1 RB defined by the Long Term Evolution (LTE) protocol is 12 subcarriers in the frequency domain and 1 time slot in the time domain, and 1 RB defined by the NR protocol is 12 consecutive subcarriers in the frequency domain.

[0063] The configuration of the number of RBs in the wireless channel can also be referred to as channel bandwidth configuration or transmission bandwidth configuration.

[0064] Ⅲ, MPR.

[0065] MPR refers to the reduction in the maximum power allowed for the UE due to high-order modulation and transmission bandwidth configuration.

[0066] The communication protocol has strict regulations on the value of MPR, and the values of MPR in different communication states are different. Table 1 shows the MPR in the centralized communication state.

[0067] Table 1 [[ID=…]]

[0068] [[ID=…]] [[ID=…]] [[ID=…]]

[0069] Ⅳ, SAR.

[0070] Under the action of an external electromagnetic field, an induced electromagnetic field will be generated in the human body. Since various organs of the human body are lossy dielectrics, an electric current will be generated in the internal electromagnetic field, resulting in the absorption and dissipation of electromagnetic energy. In biodosimetry, the SAR is often used to characterize this physical process. The meaning of SAR is the electromagnetic power absorbed or consumed by unit mass of human tissue, and the unit is W / kg.

[0071] Excessive electromagnetic radiation will have a certain impact on human health. Long-term exposure to electromagnetic radiation will make people feel physical fatigue, eye fatigue, shoulder pain, headache, drowsiness, restlessness, etc. Government departments, telecommunication regulatory agencies, etc. in various countries have promulgated corresponding regulations regarding electromagnetic radiation. The SAR limit is mainly used to protect us from the damage of wireless devices that exceed the radio frequency transmission threshold. Some countries require sales outlets to show SAR test results, and electronic products must meet strict SAR standards to gain a foothold in these markets. If the SAR of an electronic device exceeds the SAR limit, the transmission power must be reduced so that the SAR corresponding to the maximum transmission power is lower than the SAR limit. The transmission power reduced to meet the SAR limit is called SAR back-off.

[0072] Ⅴ, Over-the-air (OTA) testing.

[0073] There are mainly two ways to test the radiation performance of electronic devices: passive testing and active testing.

[0074] Passive testing is to test the radiation performance of an electronic device from the radiation performance of the antenna, focusing on examining the radiation performance of the electronic device from radiation parameters such as the gain, efficiency, and radiation pattern of the antenna. Although passive testing considers the influence of the whole machine environment (such as components around the antenna, open and closed covers) on the antenna performance, passive testing cannot directly obtain the final transmission power and receiving sensitivity after the antenna is assembled into the electronic device, and the test data is not intuitive enough.

[0075] Active testing is to test the transmission power and receiving sensitivity of an electronic device in all directions in three-dimensional space in a microwave anechoic chamber, focusing on examining the radiation performance of the electronic device from the transmission power and receiving sensitivity of the whole machine, and can directly reflect the overall radiation performance of the electronic device.

[0076] OTA testing is an active testing method. The main transmission parameter in OTA testing is the total radiated power (TRP). TRP is obtained by performing area integration and taking the average of the transmission power over the entire radiation sphere, which reflects the transmission power situation of the entire electronic device. For TRP, generally, the larger the better, so that the power coming out of the power amplifier (PA) and entering the antenna can be effectively radiated. However, in SAR testing, in order to meet the SAR limit, it is desirable that the TRP be as small as possible, so that the power absorbed by the human body is relatively small.

[0077] TRP and SAR are a pair of contradictory indicators and need to be considered comprehensively in the design of electronic devices. It is neither possible to make the TRP too large, resulting in the SAR of the electronic device exceeding the SAR limit, nor to make the TRP too small, resulting in too small a signal coverage range of the electronic device.

[0078] For NR and LTE, SAR testing is based on the maximum transmission power of the electronic device. However, the maximum transmission power of the electronic device is affected by various factors such as MPR and power fluctuation, and the actual maximum transmission power is not the same as the ideal maximum transmission power.

[0079] According to the regulations of the NR protocol and the LTE protocol, the electronic device needs to perform MPR when transmitting data through wireless signals. When the SAR back-off and MPR are inconsistent, usually the larger value is taken for back-off. For example, when the SAR back-off in a certain communication state is 2 dB and the MPR in this communication state is 1 dB, the electronic device usually takes 2 dB as the power back-off amount.

[0080] Due to manufacturing process factors, there is a certain fluctuation in the transmission power of the electronic device. For example, if the ideal maximum transmission power of the electronic device is 23 dB and the power fluctuation value is 1 dB, the actual maximum transmission power of the electronic device can reach 24 dB. Therefore, the power fluctuation value also needs to be considered when setting the SAR back-off amount.

[0081] Even for an electronic device, the MPR and power fluctuation in different communication states will be different. If the SAR back-off amount is set unreasonably, it will cause the power back-off amount in some communication states to be too large, affecting the wireless signal coverage range.

[0082] Figure 4 It is an example of power back-off without considering SAR back-off.

[0083] The electronic device operates in the LTE B1 band. As can be seen from Table 1, when the communication state of the electronic device is QPSK_1RB (QPSK modulation and 1RB configuration), the MPR of the electronic device is 0 dB; when the communication state of the electronic device is 16QAM_1RB (16QAM modulation and 1RB configuration), the MPR of the electronic device is 1 dB.

[0084] When the communication state of the electronic device is QPSK_1RB, the power fluctuation of the electronic device is 1 dB; when the communication state of the electronic device is 16QAM_1RB, the power fluctuation of the electronic device is 1.5 dB. The ideal maximum transmit power of the electronic device is 23 dB. Then, in the QPSK_1RB state, the actual maximum transmit power P QPSK_MAX of the electronic device is 24 dB, and in the 16QAM_1RB state, the actual maximum transmit power P 16QAM_MAX of the electronic device is 23.5 dB.

[0085] Since P QPSK_MAX >P 16QAM_MAX , when calculating the SAR back-off amount, P QPSK_MAX can be used as a reference. For example, if the SAR regulation stipulates that the maximum transmit power of the electronic device in the LTE B1 band shall not exceed 22 dB, then the SAR back-off amount of the electronic device is 2 dB (24 dB – 22 dB).

[0086] For the 16QAM_1RB state, the SAR back-off amount is greater than the MPR. When the electronic device determines the power back-off amount, the SAR back-off amount needs to be adopted, that is, it is back-off from 23 dB to 21 dB. However, the power fluctuation in the 16QAM_1RB state is 1.5 dB. If it is back-off to 21 dB, the actual maximum transmit power will reach 22.5 dB (21 dB + 1.5 dB), exceeding the SAR limit value (22 dB). Therefore, after considering the power fluctuation, the power back-off amount in the 16QAM_1RB state needs to reach 2.5 dB.

[0087] According to the traditional power back-off scheme, the power back-off does not distinguish the modulation method and RB configuration, and there is only one power back-off amount. In order to ensure that the maximum transmit power in each communication state does not exceed the SAR limit value, it is necessary to select the maximum value from multiple back-off amounts as the final back-off amount.

[0088] Figure 5 is an example of power back-off considering SAR back-off.

[0089] Figure 5The situation shown is when the SAR back-off amount > MPR. In this case, when the electronic device determines the power back-off amount, it needs to use the SAR back-off amount. That is, it backs off from 23 dB to 21 dB. Considering that the power fluctuation of the 16QAM_1RB state is 1.5 dB, the power back-off amount of the 16QAM_1RB state needs to reach 2.5 dB. This power back-off amount is greater than the power back-off amount of the QPSK_1RB state (2 dB). Therefore, according to the traditional power back-off scheme, 2.5 dB needs to be used as the unified power back-off amount.

[0090] When the power back-off amount is 2.5 dB, the ideal maximum transmit power of the 16QAM_1RB state backs off to 20.5 dB. Considering the power fluctuation, the actual maximum transmit power P 16QAM_MAX of the 16QAM_1RB state is 22 dB, which does not exceed the SAR limit and there is no OTA loss (power loss obtained through OTA testing).

[0091] When the power back-off amount is 2.5 dB, the ideal maximum transmit power of the QPSK_1RB state backs off to 20.5 dB. Considering the power fluctuation, the actual maximum transmit power P QPSK_MAX of the QPSK_1RB state is 21.5 dB, and P QPSK_MAX is lower than the SAR limit, resulting in an OTA loss of 0.5 dB (power loss obtained through OTA testing), which causes the coverage range of the wireless signal to shrink and affects the user's call experience.

[0092] Figure 6 This is another example of power back-off considering SAR back-off.

[0093] Figure 6 The situation shown is when the SAR back-off amount < MPR. As can be seen from Table 1, the MPR of the electronic device in the 64QAM_25RB state (64QAM modulation and 25RB configuration) is 3 dB. Since 3 dB > 2 dB (the SAR back-off amount of the QPSK_1RB state), when the electronic device determines the power back-off amount of the 64QAM_25RB state, it needs to use the MPR. That is, the ideal maximum transmit power backs off 3 dB from 23 dB to 20 dB. Considering that the power fluctuation of the 64QAM_25RB state is 1 dB, the actual maximum transmit power of the 64QAM_25RB state is 21 dB, which does not exceed the SAR limit.

[0094] The power back-off amount of the 64QAM_25RB state (3 dB) is greater than the power back-off amount of the QPSK_1RB state (2 dB). Therefore, according to the traditional power back-off scheme, 3 dB needs to be used as the unified power back-off amount.

[0095] When the power back-off is 3 dB, the ideal maximum transmit power in the 64QAM_25RB state is back-off from 23 dB to 20 dB. Considering the power fluctuation (the power fluctuation in the 64QAM_25RB state is 1 dB), the actual maximum transmit power P 64QAM_MAX in the 64QAM_25RB state is 21 dB, which does not exceed the SAR limit. Although P 64QAM_MAX does not reach the SAR limit of 22 dB, in this case, in order to meet the MPR requirements, P 64QAM_MAX cannot actually reach 22 dB. Therefore, there is no OTA loss.

[0096] When the power back-off is 3 dB, the ideal maximum transmit power in the QPSK_1RB state is back-off to 20 dB. Considering the power fluctuation, the actual maximum transmit power P QPSK_MAX in the QPSK_1RB state is 21 dB, and P QPSK_MAX is lower than the SAR limit, resulting in 1 dB of OTA loss, which reduces the coverage area of the wireless signal and affects the user's call experience.

[0097] A method for determining the maximum transmit power provided by an embodiment of the present application can avoid OTA loss in some communication states.

[0098] As Figure 7 shown, the method includes the following.

[0099] S710, the electronic device determines the current communication state.

[0100] The communication state is related to the modulation mode and the transmission bandwidth configuration (frequency band and number of resource blocks). Different communication states correspond to different MPRs. The current communication state refers to the communication state that the electronic device is using. For example, if the modulation method of the electronic device is QPSK and the RB configuration of the electronic device is 1RB, then the communication state of the electronic device is QPSK_1RB; if the modulation method of the electronic device is 16QAM and the RB configuration of the electronic device is 1RB, then the communication state of the electronic device is 16QAM_1RB; if the modulation method of the electronic device is 64QAM and the RB configuration of the electronic device is 25RB, then the communication state of the electronic device is 64QAM_25RB.

[0101] Optionally, the electronic device can obtain the physical uplink shared channel (PUSCH) configuration information; the electronic device determines the current communication state according to the PUSCH configuration information, and the PUSCH configuration information includes the current modulation mode and the current transmission bandwidth configuration.

[0102] In this embodiment, the electronic device is a user equipment. The measured power value of the PUSCH is closer to the calculated power value. Therefore, applying this method in the communication scenario of the PUSCH can reduce the probability that the actual transmission power of the wireless signal exceeds the SAR regulation due to errors.

[0103] The processor of the electronic device can read the information of the modulation mode and RB configuration currently in use from the memory, so as to determine the current communication state.

[0104] S720, the electronic device determines P1 according to the current communication state. P1 is the power after subtracting the first power back-off from the maximum transmission power of the electronic device in the preset communication state. The first power back-off is the larger one of the SAR back-off in the preset communication state and the MPR in the current communication state. The preset communication state is the communication state where the MPR is 0.

[0105] The communication state where the MPR is 0 is, for example, the communication state corresponding to the first row of QPSK in Table 1. Without considering power fluctuations and SAR back-off, the ideal maximum transmission power of the communication state where the MPR is 0 is larger than that of the communication state where the MPR is not 0. As Figure 4 shown, the ideal maximum transmission power of the QPSK_1RB state is 23 dB, and the ideal maximum transmission power of the 16QAM_1RB state is 23 dB minus the MPR, which is 22 dB. Therefore, P1 determined based on the communication state where the MPR is 0 can meet the SAR requirements and MPR requirements, and at the same time, there will be no OTA loss.

[0106] P1 can be a preset value, and the processor of the electronic device can read P1 from the memory.

[0107] S730, the electronic device obtains P2, P3, and P4. P2 is the maximum transmission power of the electronic device that meets the SAR back-off requirement in the preset communication state. P3 is the transmission power fluctuation value of the electronic device in the preset communication state. P4 is the transmission power fluctuation value of the electronic device in the current communication state.

[0108] For example, the preset communication state is QPSK_1RB. The ideal maximum transmission power of the QPSK_1RB state is 23 dB, and the SAR back-off amount of the QPSK_1RB state is 2 dB. Then the maximum transmission power P2 that meets the SAR back-off requirement in the QPSK_1RB state is 21 dB, and the transmission power fluctuation value P3 of the QPSK_1RB state is 1 dB. If the current communication state is 16QAM_1RB, then P4 is 1.5 dB.

[0109] P2, P3, and P4 are all preset values, and the processor of the electronic device can read these values from the memory.

[0110] S740, the electronic device determines the maximum transmit power in the current communication state according to the magnitude relationship between P2 + P3 and P1 + P4. Wherein, when P2 + P3 < P1 + P4, the electronic device determines that the maximum transmit power in the current communication state is P2 - [(P1 + P4) - (P2 + P3)]; when P2 + P3 ≥ P1 + P4, the electronic device determines that the maximum transmit power in the current communication state is the smaller one of P1 and P2.

[0111] If P2 + P3 < P1 + P4, it means that considering power fluctuations and MPR, the maximum transmit power in the current communication state exceeds the maximum transmit power in the preset communication state. The excess amount (i.e., [(P1 + P4) - (P2 + P3)]) can be subtracted from the maximum transmit power (P2) that meets the SAR requirements in the preset communication state, so as to obtain the final transmit power in the current communication state.

[0112] If P2 + P3 ≥ P1 + P4, it means that considering power fluctuations and MPR, the maximum transmit power in the current communication state does not exceed the maximum transmit power in the preset communication state. A smaller value can be selected from P1 and P2 as the final transmit power in the current communication state.

[0113] The above solution comprehensively considers the MPR and power fluctuation value in the current communication state when calculating the maximum transmit power. The communication state with a larger MPR has a smaller SAR back-off amount, and the communication state with a smaller MPR has a larger SAR back-off amount. The communication state with a larger power fluctuation value has a larger SAR back-off amount, and the communication state with a smaller power fluctuation value has a smaller SAR back-off amount. It can make different communication states improve the maximum transmit power as much as possible while meeting the SAR back-off requirements and MPR requirements, thereby improving the coverage range of wireless signals.

[0114] Figure 8 and <( Figure 9 respectively show the beneficial effects of adopting the embodiments of the present application.

[0115] Figure 8 In, the preset communication state is QPSK_1RB, and the current communication state is 16QAM_1RB. The ideal maximum transmit power in the QPSK_1RB state is 23 dB, the MPR is 0 dB, the SAR back-off amount is 2 dB, and the power fluctuation value (P3) is 1 dB. The ideal maximum transmit power in the 16QAM_1RB state is 23 dB, the MPR is 1 dB, the SAR back-off amount is 2 dB, and the power fluctuation value (P4) is 1.5 dB.

[0116] The maximum transmit power P2 that meets the SAR back-off requirement for the QPSK_1RB state is 21 dB (i.e., 23 dB - 2 dB). The first power back-off for the 16QAM_OneRB state is max(SAR back-off amount, MPR) = max(2 dB, 1 dB) = 2 dB. Therefore, the initial transmit power P1 for the 16QAM_OneRB state is 23 dB - 2 dB = 21 dB.

[0117] P2 + P3 = 21 dB + 1 dB = 22 dB, P1 + P4 = 21 dB + 1.5 dB = 22.5 dB. Therefore, P2 + P3 < P__1 + P4, and the electronic device determines the maximum transmit power P for the 16QAM_OneRB state 16QAM_MAX = P2 - [(P1 + P4) - (P2 + P3)] = 21 dB - [22.5 dB - 22 dB] = 20.5 dB.

[0118] In this embodiment, the electronic device determines the maximum transmit power that conforms to the current communication state based on the transmit characteristics and communication requirements of the current communication state itself. Compared with the traditional power back-off scheme, the scheme of this embodiment can maximize the transmit power as much as possible while meeting the MPR requirement and the SAR requirement, avoiding OTA loss.

[0119] Figure 9 In, the preset communication state is QPSK_OneRB, and the current communication state is 64QAM_TwentyFiveRB. The ideal maximum transmit power for the QPSK_OneRB state is 23 dB, the MPR is 0 dB, the SAR back-off amount is 2 dB, and the power fluctuation value (P3) is 1 dB. The ideal maximum transmit power for the 64QAM_TwentyFiveRB state is 23 dB, the MPR is 3 dB, the SAR back-off amount is 2 dB, and the power fluctuation value (P4) is 1 dB.

[0120] The maximum transmit power P2 that meets the SAR back-off requirement for the QPSK_OneRB state is 21 dB (i.e., 23 dB - 2 dB). The first power back-off for the 64QAM_TwentyFiveRB state is max(SAR back-off amount, MPR) = max(2 dB, 3 dB) = 3 dB. Therefore, the initial transmit power P1 for the 64QAM_TwentyFiveRB state is 23 dB - 3 dB = 20 dB.

[0121] P2 + P3 = 21 dB + 1 dB = 22 dB, P1 + P4 = 20 dB + 1 dB = 21 dB. Therefore, P2 + P3 > P1 + P4, and the electronic device determines the maximum transmit power P for the 64QAM_TwentyFiveRB state 64QAM_MAX = min(P1, P2) = min(20 dB, 21 dB) = 20 dB.

[0122] In this embodiment, the electronic device determines the maximum transmit power that conforms to the current communication state based on its own transmission characteristics and communication requirements in the current communication state. Compared with the traditional power back-off scheme, the solution of this embodiment can maximize the maximum transmit power while meeting the MPR requirements and SAR requirements, and avoid OTA losses.

[0123] Optionally, before the electronic device executes S740, it may first perform the following steps:

[0124] Determine whether P4 is greater than P3; when P4 > P3, the electronic device determines the maximum transmit power in the current communication state according to the magnitude relationship between P2 + P3 and P1 + P4.

[0125] When P4 > P3, it indicates that the power fluctuation value in the current communication state is larger than the power fluctuation value in the preset communication state, and the maximum transmit power in the current communication state may exceed the maximum transmit power in the preset communication state. At this time, it is necessary to further determine whether the maximum transmit power in the current communication state exceeds the maximum transmit power in the preset communication state based on the magnitude relationship between P2 + P3 and P1 + P4. If it exceeds, the SAR back-off amount is increased, so as to ensure that the maximum transmit power in the current communication state does not exceed the SAR requirements.

[0126] Optionally, Figure 7 The method shown further includes: when P4 ≤ P3, the electronic device determines that the maximum transmit power in the current communication state is the smaller one of P1 and P2.

[0127] When P4 > P3, it indicates that the power fluctuation value in the current communication state is less than or equal to the power fluctuation value in the preset communication state, and the maximum transmit power in the current communication state will not exceed the maximum transmit power in the preset communication state. A smaller value can be directly selected from P1 and P2 as the maximum transmit power in the current communication state, so as to ensure that the maximum transmit power in the current communication state does not violate the SAR requirements.

[0128] Optionally, after the electronic device determines the maximum transmission power in the current communication state, the method further includes: the electronic device determines whether to shut down; when the electronic device determines that it has not shut down, the electronic device obtains the communication state at the next moment; when the communication state at the next moment is different from the current communication state, the electronic device determines P5 according to the communication state at the next moment, where P5 is the power after subtracting a second power back-off from the maximum transmission power of the electronic device in the preset communication state, and the second power back-off is the larger one of the SAR back-off in the preset communication state and the MPR in the communication state at the next moment; the electronic device obtains P2, P3, and P6, where P6 is the transmission power fluctuation value of the electronic device in the current communication state; when P2 + P3 < P5 + P6, the electronic device determines that the maximum transmission power in the communication state at the next moment is P2 - [(P5 + P6) - (P2 + P3)]; when P2 + P3 ≥ P5 + P6, the electronic device determines that the maximum transmission power in the communication state at the next moment is the smaller one of P5 and P2.

[0129] After determining the maximum transmission power in the current communication state, if the electronic device has not shut down, the electronic device can continue to monitor the communication state at the next moment. When the communication state at the next moment is different from the current communication state, the electronic device can continue to determine the maximum transmission power at the next moment to ensure that the maximum transmission power at the next moment does not violate the SAR requirement.

[0130] Next, two method embodiments for determining the maximum transmission power provided by the embodiments of the present application are introduced.

[0131] As Figure 10 shown. After the electronic device is powered on, it starts to execute the method flow for determining the maximum transmission power. The electronic device can traverse the communication states in a preset order until the current communication state is determined.

[0132] For example, if the electronic device determines that the current communication state is QPSK_1RB, it will no longer execute other steps for determining the communication state (such as the steps of determining whether it is 16QAM_1RB and determining whether it is 64QAM_25RB). If the electronic device determines that the current communication state is not QPSK_1RB, it will continue to query the next communication state to determine whether the current communication state is 16QAM_1RB until the current communication state is found.

[0133] If the current communication state is QPSK_1RB, since the preset communication state is also QPSK_1RB, the electronic device determines that P2 + P3 = P1 + P4, and can determine the maximum transmission power according to P MAX = min(P1, P2).

[0134] If the current communication state is 16QAM_1RB, the electronic device can determine the maximum transmit power in the current communication state according to whether the power meets a preset condition (i.e., the magnitude relationship between P2 + P3 and P1 + P4). If the power does not meet the preset condition (i.e., P2 + P3 ≥ P1 + P4), the electronic device determines the maximum transmit power according to P MAX = min(P1, P2); if the power meets the preset condition (i.e., P2 + P3 < P1 + P4), the electronic device determines the maximum transmit power according to P MAX = P2 - [(P1 + P4) - (P2 + P3)].

[0135] After determining the maximum transmit power in the current communication state, the electronic device can continue to determine whether to perform shutdown. If shutdown is not performed, it determines the communication state at the next moment, and then determines the maximum transmit power of the communication state at the next moment.

[0136] As Figure 11 shown. After the electronic device is powered on, it starts to execute the method flow of determining the maximum transmit power. The electronic device can traverse the communication states in a preset order until the current communication state is determined. Subsequently, the electronic device determines the magnitude relationship between the power fluctuation P4 of the current communication state and the power fluctuation P3 of the preset communication state. If P4 is less than or equal to P3, the electronic device determines the maximum transmit power according to P MAX = min(P1, P2). If P4 is greater than P3, the maximum transmit power in the current communication state can be determined according to whether the power meets the preset condition (i.e., the magnitude relationship between P2 + P3 and P1 + P4). If the power does not meet the preset condition (i.e., P2 + P3 ≥ P1 + P4), the electronic device determines the maximum transmit power according to P MAX = min(P1, P2); if the power meets the preset condition (i.e., P2 + P3 < P1 + P4), the electronic device determines the maximum transmit power according to P MAX = P2 - [(P1 + P4) - (P2 + P3)].

[0137] The above text details the examples of determining the maximum transmit power provided by this application. Next, the apparatus provided by this application for implementing the above method will be described in detail. It can be understood that, in order for the apparatus to implement the functions in the above method, it includes the corresponding hardware structures and / or software modules for performing each function. Those skilled in the art should easily realize that, combining the units and algorithm steps of each example described in the embodiments disclosed in this article, this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the form of hardware or computer software driving the hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0138] This application can perform a functional unit division on the apparatus for determining the maximum transmit power according to the above method examples. For example, each function can be divided into each functional unit, or two or more functions can be integrated into one functional unit. For example, the apparatus for determining the maximum transmit power may include a processing unit for performing the determination action in the above method examples, a receiving unit for implementing the receiving action in the above method examples, and a transmitting unit for implementing the transmitting action in the above method examples. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. It should be noted that the division of units in this application is illustrative, only a logical functional division, and there may be other division methods in actual implementation.

[0139] Figure 12 The structural schematic diagram of an apparatus for determining the maximum transmit power provided by this application is shown. The apparatus 1200 can be used to implement the method described in the above method embodiments. The apparatus 1200 can be a chip or an electronic device.

[0140] The apparatus 1200 includes one or more processors 1201, and the one or more processors 1201 can support the apparatus 1200 to implement Figure 7 the method in the corresponding method embodiment. The processor 1201 can be a general-purpose processor or a dedicated processor. For example, the processor 1201 can be a central processing unit (CPU) or a baseband processor. The baseband processor can be used to process communication data (for example, the data carried by each channel described above), and the CPU can be used to control the apparatus 1200, execute software programs, and process the data of the software programs. The apparatus 1200 can also include a transceiver unit 1205 for implementing the input (receiving) and output (transmitting) of signals.

[0141] For example, the device 1200 may be a chip, and the transceiver unit 1205 may be the input and / or output circuit of the chip, or the transceiver unit 1205 may be the communication interface of the chip, and the chip may be a component of an electronic device or other wireless communication device.

[0142] The device 1200 may include one or more memories 1202, on which a program 1204 is stored. The program 1204 can be run by the processor 1201 to generate instructions 1203, so that the processor 1201 executes the methods described in the above method embodiments according to the instructions 1203. Optionally, data may also be stored in the memory 1202. Optionally, the processor 1201 may also read the data stored in the memory 1202 (for example, the data carried by each channel in the method 100), and the data may be stored at the same storage address as the program 1204, or the data may be stored at a different storage address from the program 1204.

[0143] The processor 1201 and the memory 1202 may be provided separately or integrated together. For example, they may be integrated on a single board or a system on chip (SOC).

[0144] The device 1200 may further include a transceiver unit 1205 and an antenna 1206. The transceiver unit 1205 may be referred to as a transceiver, a transceiver circuit, or a transceiver, and is used to implement the transceiver function of the device 1200 through the antenna 1206.

[0145] In a possible design, the processor 1201 is used to execute:

[0146] Determine the current communication state.

[0147] Determine P1 according to the current communication state, where P1 is the power after subtracting the first power back-off from the maximum transmit power of the device 1200 in the preset communication state, and the first power back-off is the larger one of the SAR back-off in the preset communication state and the MPR in the current communication state, and the preset communication state is the communication state where the MPR is 0.

[0148] Obtain P2, P3, and P4, where P2 is the maximum transmit power of the device 1200 that meets the SAR back-off requirement in the preset communication state, P3 is the transmit power fluctuation value of the device 1200 in the preset communication state, and P4 is the transmit power fluctuation value of the device 1200 in the current communication state.

[0149] Determine the maximum transmit power in the current communication state according to the magnitude relationship between P2 + P3 and P1 + P4. Among them, when P2 + P3 < P1 + P4, determine that the maximum transmit power in the current communication state is P2 - [(P1 + P4) - (P2 + P3)]; when P2 + P3 ≥ P1 + P4, determine that the maximum transmit power in the current communication state is the smaller one of P1 and P2.

[0150] Optionally, the processor 1201 is specifically configured to execute: obtain PUSCH configuration information; determine the current communication state according to the PUSCH configuration information, and the PUSCH configuration information includes the current modulation mode and the current transmission bandwidth configuration.

[0151] Optionally, the current transmission bandwidth configuration includes: frequency band and number of resource blocks.

[0152] Optionally, the processor 1201 is specifically configured to execute: when P4 > P3, determine the maximum transmit power in the current communication state according to the magnitude relationship between P2 + P3 and P1 + P4.

[0153] Optionally, the processor 1201 is further configured to execute: when P4 ≤ P3, determine that the maximum transmit power in the current communication state is the smaller one of P1 and P2.

[0154] Optionally, after determining the maximum transmit power in the current communication state, the processor 1201 is further configured to execute: determine whether to shut down; when it is determined that the device is not shut down, obtain the communication state at the next moment; when the communication state at the next moment is different from the current communication state, determine P5 according to the communication state at the next moment, where P5 is the power after the second power back-off from the maximum transmit power of the device 1200 in the preset communication state, and the second power back-off is the larger one of the SAR back-off in the preset communication state and the MPR in the communication state at the next moment; obtain P2, P3, and P6, where P6 is the transmit power fluctuation value of the device 1200 in the current communication state; when P2 + P3 < P5 + P6, determine that the maximum transmit power in the communication state at the next moment is P2 - [(P5 + P6) - (P2 + P3)]; when P2 + P3 ≥ P5 + P6, determine that the maximum transmit power in the communication state at the next moment is the smaller one of P5 and P2.

[0155] Optionally, the preset communication state is one of the following communication states: the modulation mode is QPSK, the transmission frequency band is 1.4 MHz, and the number of resource blocks is less than or equal to 5; the modulation mode is QPSK, the transmission frequency band is 3 MHz, and the number of resource blocks is less than or equal to 4; the modulation mode is QPSK, the transmission frequency band is 5 MHz, and the number of resource blocks is less than or equal to 8; the modulation mode is QPSK, the transmission frequency band is 10 MHz, and the number of resource blocks is less than or equal to 12; the modulation mode is QPSK, the transmission frequency band is 15 MHz, and the number of resource blocks is less than or equal to 16; the modulation mode is QPSK, the transmission frequency band is 20 MHz, and the number of resource blocks is less than or equal to 18.

[0156] It should be understood that each step of the method embodiment can be completed by a logic circuit in the form of hardware or an instruction in the form of software in the processor 1201. The processor 1201 may be a CPU, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, for example, discrete gates, transistor logic devices, or discrete hardware components.

[0157] In the case where the device 1200 is a terminal device, Figure 13 FIG. shows a schematic structural diagram of a terminal device provided in the present application. The terminal device 1300 can be applied to Figure 1 the system shown in FIG., and implement the functions of the terminal device in the above method embodiment. For the sake of convenience of description, Figure 13 only the main components of the terminal device are shown.

[0158] As Figure 13 shown, the terminal device 1300 includes a processor, a memory, a control circuit, an antenna, and an input / output device. The processor is mainly used for processing communication protocols and communication data, and for controlling the entire terminal device. For example, the processor transmits wireless signals through the antenna and the control circuit. The memory is mainly used for storing programs and data, for example, storing communication protocols and data to be transmitted. The control circuit is mainly used for the conversion between baseband signals and radio frequency signals and the processing of radio frequency signals. The control circuit and the antenna together can also be called a transceiver, which is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. The input / output device is, for example, a touch screen or a keyboard, and is mainly used for receiving data input by the user and outputting data to the user.

[0159] After the terminal device is powered on, the processor can read the program in the memory, interpret and execute the instructions contained in the program, and process the data in the program. When information needs to be sent through the antenna, after the processor performs baseband processing on the information to be sent, it outputs a baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal to obtain a radio frequency signal, and sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When the electromagnetic wave carrying the information (i.e., the radio frequency signal) reaches the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into information and processes the information.

[0160] Those skilled in the art can understand that, for the sake of convenience of description, Figure 13 only one memory and one processor are shown. In an actual terminal device, there may be multiple processors and multiple memories. The memory may also be referred to as a storage medium or a storage device, etc., and the present application does not limit this.

[0161] As an alternative implementation, Figure 13 the processor in can integrate the functions of a baseband processor and a CPU. Those skilled in the art can understand that the baseband processor and the CPU can also be separate processors, interconnected through technologies such as a bus. Those skilled in the art can understand that the terminal device can include multiple baseband processors to adapt to different network modes, the terminal device can include multiple CPUs to enhance its processing ability, and various components of the terminal device can be connected through various buses. The baseband processor can also be referred to as a baseband processing circuit or a baseband processing chip. The CPU can also be referred to as a central processing circuit or a central processing chip. The function of processing communication protocols and communication data can be built into the processor, or can be stored in the memory in the form of a program, and the processor executes the program in the memory to implement the baseband processing function.

[0162] In the present application, the antenna and the control circuit with transceiver functions can be regarded as the transceiver unit 1301 of the terminal device 1300, which is used to support the terminal device to implement the receiving function in the method embodiment, or is used to support the terminal device to implement the sending function in the method embodiment. The processor with processing functions is regarded as the processing unit 1302 of the terminal device 1300. As Figure 13As shown in the figure, the terminal device 1300 includes a transceiver unit 1301 and a processing unit 1302. The transceiver unit may also be referred to as a transceiver, a transceiver machine, a transceiver device, etc. Optionally, the device in the transceiver unit 1301 for implementing the receiving function can be regarded as a receiving unit, and the device in the transceiver unit 1301 for implementing the sending function can be regarded as a sending unit. That is, the transceiver unit 1301 includes a receiving unit and a sending unit. The receiving unit may also be referred to as a receiver, an input port, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0163] The processor 1302 can be used to execute the program stored in the memory to control the transceiver unit 1301 to receive signals and / or send signals, and complete the functions of the terminal device in the above method embodiments. As an implementation manner, the functions of the transceiver unit 1301 can be considered to be implemented by a transceiver circuit or a dedicated transceiver chip.

[0164] In the case where the device 1200 is a network device, Figure 14 is a schematic structural diagram of a network device provided by this application. This network device can be, for example, a base station. As Figure 14 shown, this base station can be applied to the system as Figure 1 shown to implement the functions of the network device in the above method embodiments. The base station 1400 may include one or more radio frequency units, such as a remote radio unit (RRU) 1401 and at least one baseband unit (BBU) 1402. Among them, the BBU 1402 may include a distributed unit (DU), or may include a DU and a central unit (CU).

[0165] The RRU 1401 may be referred to as a transceiver unit, a transceiver machine, a transceiver circuit, or a transceiver. It may include at least one antenna 14011 and a radio frequency unit 14012. The RRU 1401 is mainly used for the transceiver of radio frequency signals and the conversion between radio frequency signals and baseband signals. For example, it is used to support the base station to implement the sending function and the receiving function in the method embodiments. The BBU 1402 is mainly used for baseband processing and controlling the base station, etc. The RRU 1401 and the BBU 1402 may be physically set together or physically separated, that is, a distributed base station.

[0166] The BBU 1402 may also be referred to as a processing unit, mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spreading, etc. For example, the BBU 1402 can be used to control the base station to execute the operation process in the above method embodiments.

[0167] BBU 1402 can be composed of one or more boards. Multiple boards can jointly support a wireless access network with a single access standard, or they can each support wireless access networks with different access standards. BBU 1402 also includes a memory 14021 and a processor 14022. Memory 14021 is used to store necessary instructions and data. For example, memory 14021 stores various instructions in the above-mentioned method embodiment. Processor 14022 is used to control the base station to perform necessary actions, for example, to control the base station to execute the operation process in the above-mentioned method embodiment. Memory 14021 and processor 14022 can serve one or more boards. In other words, a separate memory and processor can be set on each board. Alternatively, multiple boards can share the same memory and processor. In addition, necessary circuits can be set on each board.

[0168] It should be noted that Figure 14 The base station shown is only an example, and the network device applicable to the present application may also be an active antenna unit (AAU) in an active antenna system (AAS).

[0169] The present application also provides a computer program product, which, when executed by a processor, implements the method described in any method embodiment of the present application.

[0170] The computer program product can be stored in a memory and finally converted into an executable target file that can be executed by a processor through preprocessing, compilation, assembly and linking.

[0171] The computer program product may also be a code solidified in a chip. This application does not limit the specific form of the computer program product.

[0172] The present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a computer, implements the method described in any method embodiment of the present application. The computer program can be a high-level language program or an executable target program.

[0173] The computer-readable storage medium may be a volatile memory or a non-volatile memory, or may include both a volatile memory and a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and directrambus RAM (DR RAM).

[0174] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes and the resulting technical effects of the above-described devices and apparatuses may refer to the corresponding processes and technical effects in the foregoing method embodiments, and will not be elaborated herein again.

[0175] In several embodiments provided in this application, the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, some features of the above-described method embodiments may be ignored or not executed. The above-described apparatus embodiments are merely illustrative. The division of units is only a logical functional division, and there may be other division methods in actual implementation. Multiple units or components may be combined or integrated into another system. In addition, the coupling between units or the coupling between components may be a direct coupling or an indirect coupling. The above coupling includes electrical, mechanical, or other forms of connection.

[0176] It should be understood that in various embodiments of this application, the magnitudes of the sequence numbers of the various processes do not mean the order of execution. The order of execution of the various processes should be determined by their functions and internal logics, and should not constitute any limitation to the implementation processes of the embodiments of this application.

[0177] In addition, the terms "system" and "network" in this document are often used interchangeably herein. The term "and / or" in this document is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: the existence of A alone, the simultaneous existence of A and B, and the existence of B alone. In addition, the character " / " in this document generally represents an "or" relationship between the associated objects before and after.

[0178] In summary, the above description is only a preferred embodiment of the technical solution of this application and is not intended to limit the protection scope of this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

1. A method for determining the maximum transmission power, characterized in that, The method includes: The electronic device determines the current communication state, where the current communication state is associated with the current modulation mode and transmission bandwidth configuration, and different communication states correspond to different MPRs; The electronic device determines P1 according to the current communication state, where P1 is the power after subtracting the first power back-off from the maximum transmission power of the electronic device in the preset communication state, and the first power back-off is the larger of the SAR back-off in the preset communication state and the MPR in the current communication state, and the preset communication state is the communication state with MPR = 0; The electronic device obtains P2, P3, and P4, where P2 is the maximum transmission power that satisfies the SAR back-off requirement of the electronic device in the preset communication state, P3 is the transmission power fluctuation value of the electronic device in the preset communication state, and P4 is the transmission power fluctuation value of the electronic device in the current communication state; The electronic device determines the maximum transmission power in the current communication state according to the magnitude relationship between P2 + P3 and P1 + P4. Among them, when P2 + P3 < P1 + P4, the electronic device determines that the maximum transmission power in the current communication state is P2 - [(P1 + P4) - (P2 + P3)], and when P2 + P3 ≥ P1 + P4, the electronic device determines that the maximum transmission power in the current communication state is the smaller of P1 and P2.

2. The method according to claim 1, wherein The electronic device determines the current communication state, including: The electronic device obtains PUSCH configuration information; The electronic device determines the current communication state according to the PUSCH configuration information, and the PUSCH configuration information includes the current modulation mode and the current transmission bandwidth configuration.

3. The method according to claim 2, wherein The current transmission bandwidth configuration includes: frequency band and number of resource blocks.

4. The method according to any one of claims 1 to 3, characterized in that, The electronic device determines the maximum transmission power in the current communication state according to the magnitude relationship between P2 + P3 and P1 + P4, including: When P4 > P3, the electronic device determines the maximum transmission power in the current communication state according to the magnitude relationship between P2 + P3 and P1 + P4.

5. The method according to claim 4, characterized in that The method further includes: When P4 ≤ P3, the electronic device determines that the maximum transmission power in the current communication state is the smaller of P1 and P2.

6. The method according to any one of claims 1 to 3, characterized in that After the electronic device determines the maximum transmission power in the current communication state, the method further includes: The electronic device determines whether to shut down; When the electronic device determines that it has not shut down, the electronic device obtains the communication state at the next moment; When the communication state at the next moment is different from the current communication state, the electronic device determines P5 according to the communication state at the next moment, where P5 is the power after subtracting the second power back-off from the maximum transmission power of the electronic device in the preset communication state, and the second power back-off is the larger of the SAR back-off in the preset communication state and the MPR in the communication state at the next moment; The electronic device obtains P2, P3, and P6, where P6 is the transmission power fluctuation value of the electronic device in the current communication state; When P2 + P3 < P5 + P6, the electronic device determines that the maximum transmit power in the communication state at the next moment is P2 - [(P5 + P6) - (P2 + P3)]; When P2 + P3 ≥ P5 + P6, the electronic device determines that the maximum transmit power in the communication state at the next moment is the smaller one of P5 and P2.

7. The method according to any one of claims 1 to 3, characterized in that The preset communication state is one of the following communication states: The modulation mode is QPSK, the transmission frequency band is 1.4 MHz, and the number of resource blocks is less than or equal to 5; The modulation mode is QPSK, the transmission frequency band is 3 MHz, and the number of resource blocks is less than or equal to 4; The modulation mode is QPSK, the transmission frequency band is 5 MHz, and the number of resource blocks is less than or equal to 8; The modulation mode is QPSK, the transmission frequency band is 10 MHz, and the number of resource blocks is less than or equal to 12; The modulation mode is QPSK, the transmission frequency band is 15 MHz, and the number of resource blocks is less than or equal to 16; The modulation mode is QPSK, the transmission frequency band is 20 MHz, and the number of resource blocks is less than or equal to 18.

8. A device for determining the maximum transmission power, characterized in that, It includes a processor and a memory. The processor and the memory are coupled. The memory is used to store a computer program. When the computer program is executed by the processor, the device executes the method according to any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the device including the processor executes the method according to any one of claims 1 to 7.

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