Power rollback method and device, communication equipment and computer readable storage medium

Abstract

The invention relates to a power rollback method and device, communication equipment and a computer readable storage medium, and relates to the technical field of communication. The power rollback method comprises the following steps: acquiring antenna impedance and equipment state information of at least one first transmitting antenna in the communication equipment; determining a use scene of the communication equipment according to the antenna impedance and the equipment state information; determining a power back-off strategy corresponding to each transmitting antenna of a target antenna group in the communication equipment according to the use scene; wherein the target antenna group comprises at least one first transmitting antenna and at least one second transmitting antenna, and the first transmitting antenna and the second transmitting antenna are located at different positions of the communication equipment; and controlling the transmitting power of the target antenna group according to the power rollback strategy. The application can subdivide the usage scenarios to perform power backoff, solves the problem of communication quality reduction caused by excessive power backoff, and improves the communication performance.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a power back-off method, apparatus, communication device, and computer-readable storage medium. Background Art

[0002] With the continuous development of communication technology, communication equipment has become an indispensable product in daily life. People's requirements for wireless performance and communication experience are constantly increasing, which leads to the demand for higher transmission power. However, higher transmission power also means stronger radiation, which may pose a threat to human health if it exceeds the safety range.

[0003] The specific absorption ratio (SAR) refers to the electromagnetic radiation energy absorbed by a unit mass of material per unit time. It is an important parameter for measuring the impact of radiation generated by communication equipment on the human body. The higher the SAR value, the greater the amount of radiation absorbed by the human body, and the greater the harm to the human body; the lower the SAR value, the less the amount of radiation absorbed by the human body, and the less harm to the human body. In order to reduce harm to the human body, it is necessary to limit the SAR value of communication equipment to meet regulatory requirements. Usually, the SAR value of communication equipment is reduced by reducing the transmission power of the communication equipment, that is, power backoff of the communication equipment.

[0004] However, current communication devices use a unified power back-off method to reduce the transmission power of the communication devices to ensure that the SAR value meets regulatory requirements, but this will affect the communication quality. Summary of the invention

[0005] The embodiments of the present application provide a power backoff method, apparatus, communication equipment, and computer-readable storage medium, which can subdivide usage scenarios for power backoff and improve communication performance.

[0006] In a first aspect, the present application provides a power backoff method, the power backoff method comprising:

[0007] Acquire antenna impedance and device status information of at least one first transmitting antenna in the communication device;

[0008] Determining a usage scenario of the communication device according to the antenna impedance and the device status information;

[0009] Determine, according to the usage scenario, a power backoff strategy corresponding to each transmitting antenna in a target antenna group in the communication device; wherein the target antenna group includes at least one of the first transmitting antennas and at least one of the second transmitting antennas, and the first transmitting antenna and the second transmitting antenna are located at different positions of the communication device;

[0010] The transmit power of the target antenna group is controlled according to the power backoff strategy.

[0011] In a second aspect, the present application provides a power backoff device, the device comprising:

[0012] An acquisition module, used to acquire antenna impedance and device status information of at least one first transmitting antenna in a communication device;

[0013] A determination module, configured to determine a usage scenario of the communication device according to the antenna impedance and the device status information, and determine a power backoff strategy corresponding to each transmitting antenna in a target antenna group in the communication device according to the usage scenario; wherein the target antenna group includes at least one of the first transmitting antennas and at least one of the second transmitting antennas, and the first transmitting antenna and the second transmitting antenna are located at different positions of the communication device;

[0014] A control module is used to control the transmit power of the target antenna group according to the power backoff strategy.

[0015] In a third aspect, the present application provides a communication device, the communication device comprising:

[0016] a target antenna group, comprising at least one first transmitting antenna and at least one second transmitting antenna, wherein the first transmitting antenna and the second transmitting antenna are located at different positions of the communication device;

[0017] A processing circuit is connected to the target antenna group, and is used to obtain the antenna impedance and device status information of at least one of the first transmitting antennas, determine the usage scenario of the communication device according to the antenna impedance and the device status information, determine the power backoff strategy corresponding to each transmitting antenna in the target antenna group according to the usage scenario, and control the transmission power of the target antenna group according to the power backoff strategy.

[0018] In a fourth aspect, the present application provides a communication device, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the aforementioned power backoff method when executing the computer program.

[0019] In a fifth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the aforementioned power back-off method are implemented.

[0020] In a sixth aspect, the present application provides a computer program product, including a computer program, characterized in that when the computer program is executed by a processor, the steps of the aforementioned power back-off method are implemented.

[0021] The power backoff method, device, communication device, computer-readable storage medium and program product obtain the antenna impedance and device status information of at least one first transmitting antenna in the communication device, determine the use scenario of the communication device according to the antenna impedance and the device status information, determine the power backoff strategy corresponding to each transmitting antenna in the target antenna group in the communication device according to the use scenario, and control the transmit power of the target antenna group according to the power backoff strategy. Since the power backoff strategy is determined according to the use scenario of the communication device, the power backoff method refines the power backoff strategy of the target antenna group from the dimension of the use scenario, and helps to improve the transmission performance of the target antenna group on the basis of satisfying the SAR value of the communication device to meet the regulatory requirements, avoids the situation where a large degree of power backoff is still performed when meeting the SAR regulatory requirements, resulting in a decrease in communication quality, and solves the problem of excessive power backoff. Compared with the related art that adopts a unified power backoff strategy regardless of the use scenario, the present application identifies the use scenario of the communication device and subdivides the power backoff strategy according to the use scenario, which can not only meet the SAR regulatory requirements, but also improve the communication performance of the communication device. In addition, the target antenna group includes at least one first transmitting antenna and at least one second transmitting antenna, and the first transmitting antenna and the second transmitting antenna are located at different positions of the communication device. The present application detects the antenna impedance of the first transmitting antenna and combines it with the device status information of the communication device to realize the identification of the usage scenario. According to the usage scenario, the transmission power of the first transmitting antenna can be regulated, and the transmission power corresponding to the second transmitting antenna can be optimized without additionally detecting the relevant information of the second transmitting antenna, thereby realizing the performance optimization of multiple transmitting antennas in the communication device and further improving the communication performance of the communication device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0023] Figure 2 One of the flowcharts of a power fallback method provided in an embodiment of the present application;

[0024] Figure 3 A second flowchart of a power fallback method provided in an embodiment of the present application;

[0025] Figure 4 A third flowchart of a power fallback method provided in an embodiment of the present application;

[0026] Figure 5 A fourth flowchart of a power fallback method provided in an embodiment of the present application;

[0027] Figure 6A fifth flowchart of a power fallback method provided in an embodiment of the present application;

[0028] Figure 7 A sixth flowchart of a power fallback method provided in an embodiment of the present application;

[0029] Figure 8 A seventh flowchart of a power fallback method provided in an embodiment of the present application;

[0030] Fig. 9 An eighth flowchart of a power fallback method provided in an embodiment of the present application;

[0031] Fig.10 A ninth flowchart of a power fallback method provided in an embodiment of the present application;

[0032] Fig.11 A schematic diagram of the structure of another communication device provided in an embodiment of the present application;

[0033] Fig.12a A Smith chart of a transmitting antenna of a communication device provided in an embodiment of the present application in a free space scenario, a desktop scenario, a left-handed holding scenario, and a right-handed holding scenario;

[0034] Figure 12b Provided in the embodiments of this application Fig.12a Grayscale image of

[0035] Fig.13 A tenth flowchart of a power fallback method provided in an embodiment of the present application;

[0036] Fig.14 A curve relationship diagram between power output value and time of a transmitting antenna in a non-handheld scenario, a handheld non-head scenario, and a head-hand scenario provided in an embodiment of the present application;

[0037] Fig.15 A schematic diagram of the structure of a power back-off device provided in an embodiment of the present application;

[0038] Fig.16 A schematic diagram of the structure of another communication device provided in an embodiment of the present application.

[0039] Description of Figure Numbers:

[0040] 10-communication device, 101-top edge, 102-bottom edge, 103-first side edge, 104-second side edge, 110-first transmitting antenna, 120-coupler, 130-detection circuit, 140-RF chip, 141-RF transceiver, 142-processing circuit, 143-scene model, 150-power amplifier, 160-filtering circuit, 170-tuning circuit, 1400-power back-off device, 1401-acquisition module, 1402-determination module, 1403-control module. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] The power calibration method provided in the embodiment of the present application can be applied to Figure 1 The communication device with wireless communication function shown in the figure may be a handheld device, a vehicle-mounted device, a customer premise equipment (Customer Premise Equipment, CPE), a wearable device, a computing device or other processing device connected to a wireless modem, as well as various forms of user equipment (User Equipment, UE) (for example, a mobile phone), a mobile station (Mobile Station, MS), etc.

[0043] In one embodiment, Figure 2 As shown, a power backoff method is provided, which is described by taking the application in the communication device 10 as an example. The power backoff method includes the following steps S201 to S204.

[0044] S201: Acquire antenna impedance and device status information of at least one first transmitting antenna in a communication device.

[0045] The communication device 10 includes at least one first transmitting antenna, and the first transmitting antenna is used to support the transmission of radio frequency signals. In application, the communication device 10 can obtain the antenna impedance of at least one first transmitting antenna when transmitting radio frequency signals. The number of first transmitting antennas can be 1, 2 or other suitable values, which are not limited here. Exemplarily, the communication device 10 includes a top edge 101 and a bottom edge 102 arranged opposite to each other, and a first side edge 103 and a second side edge 104 arranged opposite to each other, wherein the first transmitting antenna is located at least one of the bottom edge 102, the top edge 101, the first side edge 103 and the second side edge 104. For example, Figure 1Taking the communication device 10 shown in the figure as an example, the first transmitting antenna may include at least one of the antennas ANT1, ANT2, ANT3 and ANT4. It should be noted that the position of the first transmitting antenna may be set according to the communication requirements of the communication device 10. Figure 1 This is for illustrative purposes only.

[0046] Device status information refers to relevant information used to indicate the status of the communication device 10, including but not limited to the status information of the entire communication device 10, and the status information of the internal components of the communication device 10. Exemplarily, the communication device 10 includes at least one of an acceleration sensor, a gyroscope sensor, a proximity sensor, and an audio output device. Among them, the device status information includes at least one of the acceleration information collected by the acceleration sensor, the gyroscope information collected by the gyroscope sensor, the distance information collected by the proximity sensor, and the working status information of the audio output device. The acceleration information can be used to indicate the acceleration of the communication device 10 in three-dimensional space. The gyroscope information can be used to indicate the rotational angular velocity of the communication device 10 in three-dimensional space. The distance information can be used to indicate the distance between an object (such as a human body) and the communication device 10. The audio output device includes at least one of a handset, a speaker, a microphone, a headset, and a Bluetooth module. The working status information of the audio output device is used to indicate the current working status of the audio output device. It should be noted that the above is only an exemplary description of the device status information, and other types of device status information may also be included in actual applications, which should not be understood as a limitation on the device status information provided in the embodiments of the present application.

[0047] S202: Determine a usage scenario of the communication device according to antenna impedance and device status information.

[0048] The usage scenario is used to indicate the scenario in which the user uses the communication device 10. Exemplarily, the usage scenario includes a non-handheld scenario and a handheld scenario. Among them, the non-handheld scenario refers to a scenario in which the user does not directly hold the communication device 10 with a hand when using the communication device 10. For example, the non-handheld scenario includes but is not limited to a scenario in which the communication device 10 is placed on a desktop or a stand. The handheld scenario refers to a scenario in which the user directly holds the communication device 10 with a hand when using the communication device 10. Exemplarily, the handheld scenario includes a handheld non-head scenario and a head-hand scenario. Among them, the handheld non-head scenario refers to a scenario in which the user directly holds the communication device 10 with a hand when using the communication device 10, but the head does not directly contact the communication device 10. Exemplarily, the handheld non-head scenario includes at least one of a left-handed scenario, a right-handed scenario, a handheld vertical screen scenario, a handheld horizontal screen scenario, a single-handed scenario, and a double-handed scenario. The head-hand scenario refers to a scenario in which the user directly holds the communication device 10 with a hand when using the communication device 10, and the head directly contacts the communication device 10. Exemplarily, the head-hand scenario includes at least one of a left-head-hand scenario and a right-head-hand scenario. It should be noted that the above is only an exemplary description of the usage scenarios, and other types of usage scenarios may also be included in actual applications, and should not be construed as a limitation on the usage scenarios provided in the embodiments of the present application.

[0049] S203: Determine a power backoff strategy corresponding to each transmitting antenna in a target antenna group in the communication device according to a usage scenario.

[0050] The communication device 10 also includes at least one second transmitting antenna, which is used to support the transmission of radio frequency signals. The target antenna group includes at least one first transmitting antenna and at least one second transmitting antenna, and the first transmitting antenna and the second transmitting antenna are located at different positions of the communication device. The number of second transmitting antennas in the target antenna group can be 1, 2 or other suitable numbers.

[0051] It should be noted that the number and positions of the first transmitting antenna and the second transmitting antenna can be set according to the communication requirements of the communication device 10. The above is only an example and is not limited in detail.

[0052] The power backoff strategy is used to indicate whether the communication device 10 performs power backoff when transmitting signals using the target antenna group and the method of performing power backoff. In the application, the communication device 10 can determine the power backoff strategy for each transmitting antenna in the target antenna group according to the usage scenario. The power backoff strategy of the first transmitting antenna and the power backoff strategy of the second transmitting antenna can be the same or different. The power backoff strategies of transmitting antennas at different positions can be the same or different. For details, please refer to the following related embodiments for an explanation of the power backoff strategy of the transmitting antenna.

[0053] S204: Control the transmit power of the target antenna group according to the power backoff strategy.

[0054] In the application, the communication device 10 can adjust the transmit power of each transmit antenna in the target antenna group according to the power back-off strategy, so that the communication device 10 can meet the SAR regulatory requirements.

[0055] The power backoff method obtains the antenna impedance and device status information of at least one first transmitting antenna in the communication device 10, determines the use scenario of the communication device 10 according to the antenna impedance and the device status information, determines the power backoff strategy corresponding to the target antenna group in the communication device 10 according to the use scenario, and controls the transmit power of the target antenna group according to the power backoff strategy. Since the power backoff strategy is determined according to the use scenario of the communication device 10, the power backoff method refines the power backoff strategy of the target antenna group from the dimension of the use scenario, and helps to improve the transmission performance of the target antenna group on the basis of ensuring that the SAR value of the communication device 10 meets the regulatory requirements, avoids the situation where a large degree of power backoff is still performed when meeting the SAR regulatory requirements, resulting in a decrease in communication quality, and solves the problem of excessive power backoff. Compared with the related art that adopts a unified power backoff strategy regardless of the use scenario, the present application identifies the use scenario of the communication device 10 and subdivides the power backoff strategy according to the use scenario, which can not only meet the SAR regulatory requirements, but also improve the communication performance of the communication device 10.

[0056] In addition, the target antenna group includes at least one first transmitting antenna and at least one second transmitting antenna, and the first transmitting antenna and the second transmitting antenna are located at different positions of the communication device 10. The present application detects the antenna impedance of the first transmitting antenna and combines it with the device status information of the communication device 10 to realize the identification of the usage scenario. According to the usage scenario, the transmission power of the first transmitting antenna can be regulated, and the transmission power corresponding to the second transmitting antenna can be optimized without additionally detecting the relevant information of the second transmitting antenna, thereby realizing the performance optimization of multiple transmitting antennas in the communication device 10 and further improving the communication performance of the communication device 10.

[0057] It should be noted that, in the application, the communication device 10 can also obtain the antenna impedance of the second transmitting antenna, and determine the use scenario of the communication device 10 according to the antenna impedance of the first transmitting antenna, the antenna impedance of the second transmitting antenna and the device status information. This method further increases the impedance information used to identify the scenario, which is conducive to improving the recognition accuracy of the use scenario. In actual application, for example, the impedance of the transmitting antenna located on the first side 103 and the second side 104 can be detected, and the impedance of the transmitting antenna located on the top side 101, the bottom side 102, the first side 103 and the second side 104 can also be detected. The impedance detection object can be set according to the needs. This is only an exemplary description and is not too limited.

[0058] Please continue reading Figure 1 , combined with Figure 3 In one embodiment, in the target antenna group, the first transmitting antenna and the second transmitting antenna are located on the same side of the communication device 10, or the first transmitting antenna and the second transmitting antenna are respectively located on two adjacent sides of the communication device 10. Exemplarily, the communication device 10 includes a top side 101 and a bottom side 102 that are arranged oppositely, and a first side side 103 and a second side side 104 that are arranged oppositely. The first transmitting antenna is located at least one of the bottom side 102, the top side 101, the first side side 103 and the second side side 104.

[0059] For example, the target antenna group may include a first transmitting antenna located at the first side 103, and a second transmitting antenna located at the bottom 102 and / or the top 101. For another example, the target antenna group may include a first transmitting antenna located at the first side 103 and the second side 104, and a second transmitting antenna located at the bottom 102 and / or the top 101. For another example, Figure 1 Taking the communication device 10 as an example, the first transmitting antenna includes antenna ANT3 and antenna ANT4, and the second transmitting antenna includes antenna ANT1 and antenna ANT2. It should be noted that the above is only an example and should not be understood as a specific limitation of the first transmitting antenna and the second transmitting antenna in this application.

[0060] Based on the above, usage scenarios may include non-handheld scenarios, handheld non-head scenarios, and head-hand scenarios, wherein the power backoff strategies of each transmitting antenna in the target antenna group are different in the non-handheld scenarios and the head-hand scenarios, and the transmitting antennas here include the first transmitting antennas and the second transmitting antennas in the target antenna group.

[0061] It can be understood that in a non-handheld scenario, the human body is not in contact with the communication device 10, that is, each transmitting antenna in the target antenna group is not in contact with the human body. In this scenario, the energy radiated by each transmitting antenna in the target antenna group has a relatively small impact on the human body. In this regard, any transmitting antenna may not perform power backoff, that is, maintain the current transmitting power, or perform power backoff with a smaller power backoff amount. In a head-hand scenario, the head-hand is in contact with the communication device 10, and each transmitting antenna in the target antenna group is in contact with the head-hand or is blocked. In this scenario, the energy radiated by each transmitting antenna in the target antenna group has a relatively large impact on the human body. In this regard, each transmitting antenna in the target antenna group needs to perform power backoff with a larger power backoff amount. In this regard, for each transmitting antenna in the target antenna group, different power backoff strategies are adopted in non-handheld scenarios and head-hand scenarios, so that on the premise of meeting the SAR regulatory requirements, the power backoff amount of the transmitting antenna can be reduced in the non-handheld scenario, avoiding the problem of communication quality degradation caused by excessive power backoff, and improving communication performance.

[0062] Please continue reading Figure 3 In one embodiment, the usage scenario includes a non-handheld scenario, and the above step S03, determining the power backoff strategy corresponding to each transmitting antenna in the target antenna group in the communication device according to the usage scenario, may include: determining the power backoff strategy corresponding to each transmitting antenna in the target antenna group according to the non-handheld scenario includes maintaining the current transmitting power, or performing power backoff with a preset power backoff amount in the non-handheld scenario. Among them, the preset power backoff amount in the non-handheld scenario is pre-set, and the power backoff amounts corresponding to different transmitting antennas may be the same or different, which is not specifically limited here. Since each transmitting antenna of the communication device 10 does not contact the human body in the non-handheld scenario, the energy radiated by each transmitting antenna has a relatively small impact on the human body. Therefore, each transmitting antenna can maintain the current transmitting power without power backoff, or perform power backoff with a smaller power backoff amount, thereby ensuring the transmitting power of the transmitting antenna, and improving the communication performance under the premise of meeting the SAR regulatory requirements.

[0063] Please continue reading Figure 3 In one embodiment, the head-hand scene includes at least one of a left head-hand scene and a right head-hand scene. Figure 4 As shown, the above step S203, determining the power backoff strategy corresponding to each transmitting antenna in the target antenna group in the communication device according to the usage scenario, may include the following steps S401 and S402.

[0064] S401: Determine, according to the left-hand scenario, a power backoff strategy for each transmitting antenna in the target antenna group to perform power backoff at a preset power backoff amount of each transmitting antenna in the left-hand scenario.

[0065] S402: Determine, according to the right-hand scenario, a power backoff strategy for each transmitting antenna in the target antenna group to perform power backoff at a preset power backoff amount of each transmitting antenna in the right-hand scenario.

[0066] In an embodiment of the present application, each transmitting antenna in the target antenna group includes all first transmitting antennas and all second transmitting antennas in the target antenna group. Among them, the power backoff amount of each transmitting antenna in the left-hand scenario and the power backoff amount in the right-hand scenario are pre-set. The power backoff amount of each transmitting antenna in the left-hand scenario may be the same or different. The power backoff amount of each transmitting antenna in the right-hand scenario may be the same or different. Moreover, at least one transmitting antenna in the target antenna group has different power backoff amounts in the left-hand scenario and the right-hand scenario. For example, each transmitting antenna in the target antenna group has different power backoff amounts in the left-hand scenario and the right-hand scenario.

[0067] It is understandable that in the head-hand scenario, whether it is the left head-hand scenario or the right head-hand scenario, each transmitting antenna in the target antenna group is in contact with the head and hand or is blocked, and the energy radiated by each transmitting antenna has a relatively large impact on the human body. Therefore, in the left head-hand scenario and the right head-hand scenario, the SAR regulatory requirements are met by reducing the transmit power through power backoff for each transmitting antenna. Since the relative position of the same transmitting antenna and the head and hand in the left head-hand scenario and the right head-hand scenario is different, the power backoff amount of the transmitting antenna in the left head-hand scenario and the right head-hand scenario can be differentiated. The power backoff strategy of the transmitting antenna in different scenarios is further refined, which can further improve the communication performance while meeting the SAR regulatory requirements.

[0068] Please continue reading Figure 1 and Figure 3 In one embodiment, in the target antenna group, at least one of the first transmitting antenna and the second transmitting antenna is located at the top edge 101 of the communication device. The handheld non-head scene includes a handheld vertical screen scene. Figure 5 As shown, step S203, determining the power backoff strategy corresponding to each transmitting antenna in the target antenna group in the communication device according to the usage scenario, can include the following steps S501 and S502.

[0069] S501: Determine, according to the handheld vertical screen scenario, that the power backoff strategy corresponding to the transmitting antenna located at the top edge in the target antenna group is to maintain the current transmitting power, or to perform power backoff at a preset power backoff amount in the handheld vertical screen scenario.

[0070] S502: Determine, according to the handheld vertical screen scenario, that the remaining transmitting antennas in the target antenna group perform power backoff at a preset power backoff amount in the handheld vertical screen scenario.

[0071] The preset power backoff amount of each transmitting antenna in the target antenna group in the handheld vertical screen scenario is pre-set. In addition, in the handheld vertical screen scenario, the power backoff amount of the transmitting antenna located at the top edge 101 is less than the power backoff amount of the remaining transmitting antennas. In step S502, the remaining antennas in the target antenna group refer to the transmitting antennas located at the bottom edge 102, the first side edge 103, and the second side edge 104 in the target antenna group.

[0072] For example, Figure 1 As shown, if a first transmitting antenna in the target transmitting antenna includes an antenna ANT3 located on the first side 103, and a second transmitting antenna in the target transmitting antenna includes an antenna ANT1 located on the top edge 101, in this regard, in a handheld vertical screen scenario, antenna ANT1 can maintain the current transmission power, that is, no power backoff is performed, and antenna ANT3 performs power backoff with a corresponding preset power backoff amount.

[0073] It is understandable that, in a handheld vertical screen scenario, generally, the transmitting antenna located at the top edge 101 does not contact the human hand or is not blocked, and the energy radiated by the transmitting antenna located at the top edge 101 has a relatively small impact on the human body; the transmitting antennas located at the bottom edge 102, the first side edge 103, and the second side edge 104 are in contact with the human hand or are blocked, and the energy radiated by these transmitting antennas has a relatively large impact on the human body. Therefore, in a handheld vertical screen scenario, the transmitting power of the transmitting antenna located at the top edge 101 is guaranteed by maintaining the current transmitting power or performing power backoff at a smaller preset power backoff amount, and the transmitting antenna located at the bottom edge 102, the first side edge 103, and the second side edge 104 are power backed off at a larger preset power backoff amount, so as to reduce the impact of the antenna radiation energy on the human body, thereby meeting the SAR regulatory requirements and improving communication performance.

[0074] Please continue reading Figure 1 In one embodiment, the handheld vertical screen scenario includes at least one of a left-handed vertical screen scenario and a right-handed vertical screen scenario. Among them, at least one transmitting antenna in the target antenna group has different power backoff amounts in the left-handed vertical screen scenario and the right-handed vertical screen scenario. For example, each transmitting antenna in the target antenna group has different power backoff amounts in the left-handed vertical screen scenario and the right-handed vertical screen scenario. Since there is a difference in the relative position of the same transmitting antenna in the target antenna group and the human body in the left-handed vertical screen scenario and the right-handed vertical screen scenario, the power backoff amount of the transmitting antenna in the left-handed vertical screen scenario and the right-handed vertical screen scenario can be differentiated. The power backoff strategy of the transmitting antenna in different scenarios is further refined, and the communication performance can be further improved while meeting the SAR regulatory requirements.

[0075] Please continue reading Figure 1 and Figure 3 In one embodiment, at least one of the first transmitting antenna and the second transmitting antenna is located on a side of the communication device, where the side includes at least one of the first side 103 and the second side 104. The usage scenario includes a handheld horizontal screen scenario. Figure 6 As shown, step S203, determining the power backoff strategy corresponding to each transmitting antenna in the target antenna group in the communication device according to the usage scenario, can include the following steps S601 and S602.

[0076] S601: Determine, according to the handheld horizontal screen scenario, that the power backoff strategy corresponding to the transmitting antenna located at the side in the target antenna group is to maintain the current power, or to perform power backoff at a preset power backoff amount in the handheld horizontal screen scenario.

[0077] For example, the transmitting antenna located in the middle of the side maintains the current transmitting power, and the transmitting antennas located at both ends of the side perform power backoff at a preset power backoff amount in a handheld horizontal screen scenario.

[0078] S602: Determine the remaining transmitting antennas in the target antenna group according to the handheld horizontal screen scenario to perform power backoff at a preset power backoff amount for the handheld horizontal screen scenario.

[0079] Among them, in the handheld horizontal screen scenario, the power backoff amount of the transmitting antenna located on the side is less than or equal to the power backoff amount of the remaining transmitting antennas.

[0080] The preset power backoff amount of each transmitting antenna in the target antenna group in the handheld horizontal screen scenario is pre-set. In addition, in the handheld horizontal screen scenario, the power backoff amount of the transmitting antenna located on the side is less than or equal to the power backoff amount of the remaining transmitting antennas. In step S602, the remaining antennas in the target antenna group refer to the transmitting antennas located on the remaining sides of the target antenna group, and the remaining sides here refer to other sides other than the side sides.

[0081] For example, Figure 1 As shown, if the two first transmitting antennas in the target transmitting antenna include antenna ANT3 located on the first side 103 and antenna ANT4 located on the second side 104, the two second transmitting antennas in the target transmitting antenna include antenna ANT1 located on the top edge 101 and antenna ANT2 on the bottom edge 102, in this regard, in a handheld horizontal screen scenario, antenna ANT3 and antenna ANT4 can maintain the current transmission power, that is, no power backoff is performed, and antenna ANT1 and antenna ANT2 can each perform power backoff with a corresponding preset power backoff amount.

[0082] It is understandable that in a handheld horizontal screen scenario, generally, the transmitting antennas located in the middle of the first side 103 and the middle of the second side 104 are not in contact with human hands, and the energy radiated by these transmitting antennas has a relatively small impact on the human body; the transmitting antennas in the remaining positions are in contact with human hands or are blocked, and the energy radiated by these transmitting antennas has a relatively large impact on the human body. Therefore, in a handheld horizontal screen scenario, the transmitting power of the transmitting antenna located in the middle of the side is guaranteed by maintaining the current transmitting power or performing power backoff at a smaller preset power backoff amount, and the transmitting antenna in the remaining positions is power backed off at a larger preset power backoff amount to reduce the impact of the antenna radiation energy on the human body, which not only meets the SAR regulatory requirements but also improves communication performance.

[0083] In one embodiment, step S202, determining a usage scenario of the communication device according to antenna impedance and device status information, may include: determining a usage scenario of the communication device according to antenna impedance, device status information and a pre-trained scenario model.

[0084] Exemplarily, based on the scenario model, the usage scenario of the communication device 10 is determined according to the antenna impedance and the device status information, wherein at least one of the antenna impedance and the device status information can be used as an input of the scenario model, that is, the scenario module can be used to determine the usage scenario of the communication device 10 according to at least one of the antenna impedance and the device status information.

[0085] For example, it can be determined that the communication device 10 is in a non-handheld scenario or a handheld scenario based on the antenna impedance and the first mapping data; further, in the handheld scenario, it can be determined based on the scenario model and the device status information (such as gyroscope information) whether the use scenario of the communication device 10 is a left-handed scenario or a right-handed scenario, wherein the device status information such as gyroscope information is used as the input of the scenario model, and the scenario model can be used to identify whether the use scenario of the communication device 10 is a left-handed scenario or a right-handed scenario; and, it can be determined that the use scenario of the communication device 10 is a handheld non-head scenario or a head-hand scenario based on the device status information (such as at least one of acceleration information, distance information, and working status information) and the second mapping data. The handheld non-head scenario and the head-hand scenario here can be further subdivided, and the details can be referred to the above-mentioned related introduction, which will not be repeated here. Among them, the first mapping data is used to represent the mapping relationship between the antenna impedance and the use scenario (including the non-handheld scenario and the handheld scenario). The second mapping data is used to represent the mapping relationship between the device status information (including at least one of acceleration information, distance information, and working status information) and the use scenario (including the handheld non-head scenario and the head-hand scenario).

[0086] It should be noted that the above is only an exemplary description, and the scenario model can be trained according to actual conditions, and at least one of the antenna impedance and the device status information can be selected as the input of the model according to the actual scenario to determine the usage scenario of the communication device 10.

[0087] Exemplarily, the scene model may adopt K-nearest neighbor (KNN), multilayer perceptron (MLP), support vector machine (SVM) or other suitable artificial intelligence (AI) models.

[0088] Taking the scenario model as a KNN model as an example, the above steps, according to the antenna impedance, device status information and the pre-trained scenario model, determine the usage scenario of the communication device, and may include: initialization, distance calculation, neighbor acquisition, decision rules and return results. Specifically, the initialization process is to set the K value, where K is a user-defined parameter, generally a small constant, that is, select the nearest points. The distance calculation process is to calculate the distance between each point in the data set of unknown category attributes and all points in the known category data set, and the Euclidean distance or Manhattan distance can be used. In an embodiment of the present application, the data set of unknown category attributes may include the antenna impedance and device status information of the first transmitting antenna, and the data set of known category attributes may include the antenna impedance and device status information of the first transmitting antenna in a known usage scenario. The neighbor acquisition process is to sort all the distances obtained in the distance calculation process, find the K closest points, and the classification of these points is the predicted classification. The decision rule refers to determining the most categories corresponding to the K nearest points determined by the aforementioned process as the usage scenario. Exemplarily, the decision rule includes majority voting, weighted voting or other suitable rules. The return result is to return the predicted usage scenario.

[0089] It should be noted that the above is only an exemplary description of the scenario model and should not be understood as a limitation on the scenario model in the embodiments of the present application. The scenario model may also adopt any other suitable AI model to identify the usage scenario of the communication device 10, and no excessive limitations are made here.

[0090] like Figure 7 As shown, the scene model is trained by the following steps S301 and S302.

[0091] S701: Acquire a training sample, where the training sample includes a usage scenario of a communication device and antenna impedance of a corresponding first transmitting antenna and / or device status information.

[0092] The training sample may include the usage scenario of the communication device 10 and the antenna impedance of the first transmitting antenna in the usage scenario. Alternatively, the training sample may include the usage scenario of the communication device 10 and the device status information in the usage scenario. Alternatively, the training sample may include the usage scenario of the communication device 10 and the antenna impedance and device status information of the first transmitting antenna in the usage scenario.

[0093] In the application, the antenna impedance of the first transmitting antenna and the device status information of the communication device 10 in a variety of different usage scenarios of the communication device 10 can be obtained. Among them, the usage scenarios in the training samples may include non-handheld scenarios and / or handheld scenarios, the handheld scenarios may include handheld non-head scenarios and / or head-hand scenarios, and the handheld non-head scenarios may include at least one of left-handed scenarios, right-handed scenarios, handheld vertical screen scenarios, handheld horizontal screen scenarios, single-handed scenarios, and double-handed scenarios. The head-hand scenario may include a left head-hand scenario and / or a right head-hand scenario. The device status information in the training samples may include at least one of acceleration information collected by an acceleration sensor, gyroscope information collected by a gyroscope sensor, distance information collected by a proximity sensor, and working status information of an audio output device.

[0094] It should be noted that the above is only an exemplary description of usage scenarios and device status information. Practical applications may also include other types of usage scenarios and device status information, and should not be construed as a limitation on the usage scenarios and device status information provided in the embodiments of the present application.

[0095] S702: Train a pre-built initial scene model according to the training samples, and obtain the trained scene model.

[0096] The initial scene model is an untrained AI model. In the application, the training samples can be split into a training set and a test set. The training set is used to train the initial scene model, and the test set is used to test the trained initial scene model. If the model recognition accuracy does not reach the preset recognition threshold, the model is adjusted and optimized until the preset recognition threshold is reached, thereby obtaining a scene model with a higher recognition accuracy.

[0097] The above-mentioned power back-off method is based on the scenario model, and determines the usage scenario of the communication device 10 according to the antenna impedance and the device status information, which can improve the recognition accuracy of the usage scenario of the communication scenario. In particular, since the antenna impedance in the left-hand holding scenario and the right-hand holding scenario is highly similar, the present application can identify the left-hand holding scenario and the right-hand holding scenario through AI learning, which can further improve the recognition accuracy of the scene, thereby realizing precise control of the transmission power of the target antenna group, and improving the communication performance of the communication device 10 while meeting the requirements of SAR regulations.

[0098] In one embodiment, step S201, obtaining the antenna impedance and device status information of at least one first transmitting antenna in the communication device, includes: the step of obtaining the antenna impedance timing and device status timing of at least one first transmitting antenna within a preset time length. Among them, the antenna impedance timing includes the antenna impedance of the first transmitting antenna and the corresponding timestamp, and the device status timing includes the device status information of the communication device 10 and the corresponding timestamp. The preset time length is pre-set, for example, it can be 10s, 30s, 1min, etc., which is not limited here. Exemplarily, the antenna impedance timing of the first transmitting antenna within the preset time length and the device status timing of the communication device 10 can be obtained respectively according to the preset period, wherein the antenna impedance timing corresponds to the timestamp of the device status timing one by one. The preset period is pre-set, and can be 0.1s, 0.5s, 1s, etc., which is not limited here.

[0099] Step S202, determining the usage scenario of the communication device according to the antenna impedance and the device status information, includes: determining the usage scenario of the communication device for a preset time period according to the antenna impedance timing and the device status timing. That is, using multiple sets of antenna impedance and device status information to determine the usage scenario of the communication device 10 within a period of time, this can improve the recognition accuracy of the usage scenario, reduce the misjudgment rate, and improve the reliability of the communication device 10.

[0100] In one embodiment, Figure 8 As shown, the above steps, which determine the usage scenario of the communication device 10 for a preset time period according to the antenna impedance timing and the device state timing, include the following steps S801 and S802.

[0101] S801: Determine an amount of change in antenna impedance of a first transmitting antenna within a preset time period according to an antenna impedance time sequence.

[0102] The antenna impedance variation is used to indicate the variation of the antenna impedance of the first transmitting antenna within a preset time period. Exemplarily, the antenna impedance variation may be the difference between the maximum antenna impedance and the minimum antenna impedance of the first transmitting antenna within the preset time period.

[0103] S802: When the antenna impedance change is less than a preset impedance threshold, determine a usage scenario of the communication device for a preset time period according to the antenna impedance timing and the device state timing.

[0104] The preset impedance threshold is pre-set and can be obtained based on experiments, and is not specifically limited here. If the antenna impedance change is less than the preset impedance threshold, it indicates that the antenna impedance of the first transmitting antenna changes little within the preset time length. In this case, the use scenario of the communication device 10 in the preset time length can be determined based on the antenna impedance timing and the device status timing. The recognition result obtained in this way has high reliability and can improve the reliability of the communication device 10. If the antenna impedance change is greater than or equal to the preset impedance threshold, it indicates that the antenna impedance of the first transmitting antenna changes greatly within the preset time length, and the use scenario of the communication device 10 may have changed within the preset time length. In this case, the antenna impedance timing and device status timing within the next preset time length can be obtained. Among them, the next preset time length can be two adjacent time periods with the current preset time length, or two time periods with partial overlap, which is not limited here.

[0105] In one embodiment, Fig. 9 As shown, the above steps, which determine the usage scenario of the communication device for a preset time period according to the antenna impedance timing and the device state timing, include the following steps S901 and S902.

[0106] S901: Determine a usage scenario corresponding to each timestamp of the communication device within a preset time period according to the antenna impedance timing and the device state timing.

[0107] In the application, the communication device 10 can determine the antenna impedance and / or device status information corresponding to each timestamp based on the antenna impedance timing and the device status timing, and determine the usage scenario of the corresponding timestamp based on the antenna impedance and / or device status information, thereby determining the usage scenario corresponding to each timestamp of the communication device 10 within a preset time length.

[0108] S902: When the usage scenarios corresponding to each timestamp are the same, determine the usage scenario of the communication device for a preset time period.

[0109] If the usage scenario corresponding to each timestamp is the same, it indicates that the usage scenario of the communication device 10 has not changed within the preset time, and the usage scenario of the communication device 10 in the preset time can be determined, so that the power backoff strategy corresponding to the target antenna group can be determined according to the usage scenario, so as to adjust the transmission power of the target antenna group according to the power backoff strategy. If the usage scenario corresponding to each timestamp is different, it indicates that the usage scenario of the communication device 10 has changed within the preset time, in which case the antenna impedance timing and device status timing within the next preset time can be obtained.

[0110] The above-mentioned power back-off method obtains the antenna impedance timing of the first transmitting antenna and the device status timing of the communication device 10 within a preset time period, and determines the usage scenario of the communication device 10 within the preset time period according to the antenna impedance timing and the device status timing of the communication device 10. This is equivalent to combining the time domain in the scene recognition process, using multiple groups of antenna impedance and device status information within a certain time domain, and by increasing the amount of information used to identify the scene, the recognition accuracy of the usage scenario is improved, thereby improving the reliability of the communication device 10.

[0111] Furthermore, by comparing the antenna impedance change of the first transmitting antenna within a preset time period with a preset impedance threshold, and when the antenna impedance change is less than the preset impedance threshold, the usage scenario of the communication device 10 within the preset time period can be determined according to the antenna impedance timing and the device status timing. That is, the change of the usage scenario is measured from the dimension of the change of the antenna impedance, and identified in combination with the device status information within a certain time period, which helps to improve the accuracy of usage scenario identification, and there is no need to perform scene identification in real time, which reduces the amount of data processing and helps to improve identification efficiency.

[0112] In addition, the usage scenario of the communication device 10 can be identified in real time based on the antenna impedance timing and the device status timing, and when the usage scenario of each timestamp within the preset time period is the same, the usage scenario of the communication device 10 within the preset time period can be determined. That is, using multiple scene recognition results within a certain time period for judgment can avoid misjudgment due to changes in usage scenarios in a short period of time, which helps to improve the scene recognition accuracy and thus enhance the reliability of the communication device 10.

[0113] In one embodiment, Fig.10 As shown, step S201, obtaining the antenna impedance of at least one first transmitting antenna in the communication device 10, includes the following steps S1001 to S1003.

[0114] S1001: Acquire forward power and reverse power of a communication device communicating through a first transmitting antenna.

[0115] For example, Fig.11As shown, the communication device 10 may also include a coupler 120 (Coupler, CPL) and a detection circuit 130, wherein the coupler 120 is connected to the first transmitting antenna 110, and the coupler 120 may be used to obtain a first transmission signal transmitted to the first transmitting antenna and a second RF signal from the first transmitting antenna. The detection circuit 130 is connected to the coupler 120, and the detection circuit 130 is used to determine the forward power of the communication device 10 according to the first RF signal, and to determine the reverse power of the communication device 10 according to the second RF signal. The first transmission signal may be understood as an RF signal sent by the transmission path to the first transmitting antenna, and the second transmission signal may be understood as a feedback signal acquired by collecting the RF signal transmitted by the first transmitting antenna.

[0116] Please continue reading Fig.11 , exemplarily, the communication device 10 may further include a radio frequency chip, a power amplifier 150 and a filtering circuit 160. Among them, the radio frequency chip 140 is respectively connected to the power amplifier 150 and the detection circuit 130, and the radio frequency chip 140 may include a radio frequency transceiver 141 and a processing circuit 142. Among them, the radio frequency chip 140 can be used to store a scene model 143. The radio frequency transceiver 141 is used to support the transmission and reception of radio frequency signals. The processing circuit 142 is used to execute the power back-off method provided in an embodiment of the present application. The power amplifier 150 is used to support power amplification of radio frequency signals. The filtering circuit 160 is respectively connected to the power amplifier 150 and the coupler 120, and the filtering circuit 160 is used to support filtering of radio frequency signals.

[0117] It should be noted that Fig.11 Taking only one first transmitting antenna 110 as an example for illustration, when the first transmitting antenna includes multiple antennas, the communication device 10 may include a detection circuit 130 and multiple couplers 120. The coupler 120 is connected to the first transmitting antenna correspondingly. The multiple couplers 120 are connected to different first transmitting antennas. The multiple couplers 120 are respectively connected to the detection circuit 130. The detection circuit 130 is used to respectively determine the antenna impedance of each first transmitting antenna. In specific applications, the coupler 120 and the detection circuit 130 can be set according to the actual scenario, and no excessive restrictions are made here.

[0118] S1002: Determine a reflection coefficient of a first transmitting antenna according to forward power and reverse power.

[0119] The reflection coefficient is also called return loss RL (Return Loss). In applications, the communication device 10 can determine the reflection coefficient of the first transmitting antenna according to the forward power and the reverse power.

[0120] S1003: Determine the antenna impedance of the first transmitting antenna according to the reflection coefficient.

[0121] In an application, the communication device 10 can determine the antenna impedance of the first transmitting antenna 110 according to the reflection coefficient. Fig.12a and Figure 12b As shown, the Smith circle diagram of the transmitting antenna in free space (i.e., non-handheld scenario), desktop scenario, left-handed scenario, and right-handed scenario is provided, where: Figure 12b for Fig.12a Grayscale diagram of . Fig.12a and Figure 12b It can be seen that the impedance of the transmitting antenna in the handheld scenario is quite different from that in the free space and the desktop scenario. There is also a difference in the impedance of the transmitting antenna in the left-handed and right-handed scenarios.

[0122] The above-mentioned power back-off method obtains the forward power and reverse power of the communication device 10 communicating through the first transmitting antenna, determines the reflection coefficient of the first transmitting antenna according to the forward power and the reverse power, and determines the antenna impedance of the first transmitting antenna according to the reflection coefficient. Due to the particularity of the human body material, when the human body contacts the antenna, it will cause a significant impedance difference with the free space state. Therefore, the embodiment of the present application adopts the antenna impedance of the first transmitting antenna and combines the device status information to identify the usage scenario of the communication device 10, so that the power back-off strategy of the target antenna group can be subdivided according to the usage scenario, thereby achieving an improvement in communication performance.

[0123] Please continue reading Figure 1 In one embodiment, taking the example that the first transmitting antenna includes the antenna ANT3 located at the first side edge 103, and the second transmitting antenna includes the antenna ANT1 located at the top edge 101 and the antenna ANT2 located at the bottom edge 102, in a non-handheld scenario, the antenna ANT3 does not perform power backoff or performs power backoff with the first power backoff amount, the antenna ANT1 does not perform power backoff or performs power backoff with the second power backoff amount, and the second transmitting antenna ANT2 does not perform power backoff or performs power backoff with the third power backoff amount; in a handheld non-head scenario, the antenna ANT3 performs power backoff with the fourth power backoff amount, the antenna ANT1 does not perform power backoff or performs power backoff with the fifth power backoff amount, and the antenna ANT2 performs power backoff with the sixth power backoff amount; in a head-hand scenario, the antenna ANT3 performs power backoff with the seventh power backoff amount, the antenna ANT1 performs power backoff with the eighth power backoff amount, and the antenna ANT2 performs power backoff with the ninth power backoff amount. Among them, the first power backoff amount is less than the fourth power backoff amount, and the fourth power backoff amount is less than or equal to the seventh power backoff amount; the second power backoff amount is less than the fifth power backoff amount, and the fifth power backoff amount is less than or equal to the eighth power backoff amount; the third power backoff amount is less than the sixth power backoff amount, and the sixth power backoff amount is less than or equal to the ninth power backoff amount.

[0124] Please continue reading Fig.11 In one embodiment, the power back-off method further includes: a step of adjusting the matching impedance of the tuning circuit 170 in the communication device 10 according to the antenna impedance of the first transmitting antenna. The tuning circuit 170 is connected to the first transmitting antenna. In the case where the communication device 10 includes a coupler 120 and a processing circuit 142, the tuning circuit 170 is respectively connected to the first transmitting antenna 110, the coupler 120, and the processing circuit 142, and the tuning circuit 170 can be used to adjust the matching impedance under the control of the processing circuit 142. It can be understood that the antenna impedance of the first transmitting antenna may be different in different usage scenarios. Therefore, the present application further improves the transmission performance of the antenna by adjusting the matching impedance of the tuning circuit 170 to adapt the antenna impedance, thereby improving the communication performance of the communication device 10.

[0125] In one embodiment, Fig.13 As shown, a power backoff method is provided, and the power backoff method is applied to Figure 1 Taking the communication device 10 shown as an example, the communication device 10 includes antennas ANT1 to ANT4, an acceleration sensor, a gyroscope sensor, a proximity sensor, an audio output device, a coupler 120, a detection circuit 130, a radio frequency chip, a power amplifier 150, and a filter circuit 160, wherein the first transmitting antenna includes an antenna ANT3 located at the first side 103 (i.e., the left side) and an antenna ANT4 located at the second side 104 (i.e., the right side), and the second transmitting antenna includes an antenna ANT1 located at the top side 101 and an antenna ANT2 located at the bottom side 102. The power backoff method includes the following steps S1301 to S1309.

[0126] S1301: Acquire training samples, the training samples including antenna impedance of a first transmitting antenna and device status information of a communication device in various usage scenarios. In this embodiment, the device status information includes acceleration information collected by an acceleration sensor, a gyroscope collected by a gyroscope sensor, distance information collected by a proximity sensor, and working status information of an audio output device.

[0127] S1302: Train the initial scene model according to the training samples to obtain a trained scene model, wherein the scene model is a KNN model.

[0128] S1303: Acquire the antenna impedance time sequence and device status time sequence of the first transmitting antenna within a preset time period respectively, wherein the antenna impedance time sequence includes the first impedance time sequence of the antenna ANT3 and the second impedance time sequence of the antenna ANT4.

[0129] S1304: Determine the antenna impedance change amount within the preset time length according to the antenna impedance time sequence, wherein the antenna impedance change amount includes a first impedance change amount corresponding to the antenna ANT3 and a second impedance change amount corresponding to the antenna ANT4.

[0130] S1305: When the antenna impedance change is less than a preset impedance threshold, determine the usage scenario of the communication device at each timestamp within a preset time period according to the antenna impedance timing, the device state timing and the scenario model.

[0131] S1306: Determine a power backoff strategy for a first transmitting antenna and a power backoff strategy for a second transmitting antenna in the communication device according to a usage scenario.

[0132] S1307: Determine a power backoff amount of the first transmitting antenna according to the power backoff policy of the first transmitting antenna, and determine a power backoff amount of the second transmitting antenna according to the power backoff policy of the second transmitting antenna.

[0133] S1308: Adjust the transmit power of the first transmit antenna according to the power backoff amount of the first transmit antenna, and adjust the transmit power of the second transmit antenna according to the power backoff amount of the second transmit antenna.

[0134] S1309: Adjust the matching impedance of the tuning circuit according to the antenna impedance.

[0135] like Figure 3 and Fig.14 As shown, in the non-handheld scenario, no power backoff is performed on each transmitting antenna, or power backoff is performed with a smaller power backoff amount. In the head-hand scenario, in the left head-hand scenario, each transmitting antenna is power backed off according to the corresponding left head-hand power backoff amount, and in the right head-hand scenario, each transmitting antenna is power backed off according to the right head-hand power backoff amount. In the handheld non-head scenario, the left-hand holding vertical screen scenario and the right-hand holding vertical screen scenario respectively power backoff the antennas ANT2 to ANT4 according to the corresponding left-hand holding vertical screen power backoff amount, and the antenna ANT1 is not power backed off or power backoff is performed with a smaller power backoff amount; in the double-hand holding horizontal screen scenario, the antennas ANT3 and ANT4 are power backed off according to the corresponding double-hand holding horizontal screen power backoff amount, and the antennas ANT1 and ANT2 are not power backed off or power backoff is performed with a smaller power backoff amount.

[0136] The power backoff method provided in the embodiment of the present application is based on antenna impedance detection and other sensor data, accurately identifies the user's usage scenarios through AI learning, and accurately performs power backoff for the identified scenarios, thereby solving the current problem of excessive SAR backoff and improving the communication performance of the communication device 10.

[0137] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0138] Based on the same inventive concept, the embodiment of the present application also provides a power backoff device for implementing the power backoff method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more power backoff device embodiments provided below can refer to the limitations of the power backoff method above, and will not be repeated here.

[0139] In one embodiment, Fig.15 As shown, a power backoff device 1500 is provided, including: an acquisition module 1501, a determination module 1502 and a control module 1503. The acquisition module 1501 is used to acquire the antenna impedance and device status information of at least one first transmitting antenna in the communication device 10. The determination module 1502 is used to determine the use scenario of the communication device 10 according to the antenna impedance and the device status information, and determine the power backoff strategy corresponding to each transmitting antenna in the target antenna group in the communication device 10 according to the use scenario; wherein the target antenna group includes at least one first transmitting antenna and at least one second transmitting antenna, and the first transmitting antenna and the second transmitting antenna are located at different positions of the communication device 10. The control module 1503 is used to control the transmit power of the target antenna group according to the power backoff strategy.

[0140] The power backoff device 1500 obtains the antenna impedance and device status information of at least one first transmitting antenna in the communication device 10 through the acquisition module 1501, determines the use scenario of the communication device 10 according to the antenna impedance and the device status information through the determination module 1502, determines the power backoff strategy corresponding to the target antenna group in the communication device 10 according to the use scenario, and controls the transmit power of the target antenna group according to the power backoff strategy through the control module 1503, refines the power backoff strategy of the target antenna group from the dimension of the use scenario, and helps to improve the transmission performance of the target antenna group on the basis of satisfying the SAR value of the communication device 10 to meet the regulatory requirements, avoids the situation where a large degree of power backoff is still performed when meeting the SAR regulatory requirements, resulting in a decrease in communication quality, and solves the problem of excessive power backoff. Compared with the related art that adopts a unified power backoff strategy regardless of the use scenario, the present application identifies the use scenario of the communication device 10 and subdivides the power backoff strategy according to the use scenario, which can not only meet the SAR regulatory requirements, but also improve the communication performance of the communication device 10. In addition, the target antenna group includes at least one first transmitting antenna and at least one second transmitting antenna, and the first transmitting antenna and the second transmitting antenna are located at different positions of the communication device 10. The present application detects the antenna impedance of the first transmitting antenna and combines it with the device status information of the communication device 10 to realize the identification of the usage scenario. According to the usage scenario, the transmission power of the first transmitting antenna can be regulated, and the transmission power corresponding to the second transmitting antenna can be optimized without additionally detecting the relevant information of the second transmitting antenna, thereby realizing the performance optimization of multiple transmitting antennas in the communication device 10 and further improving the communication performance of the communication device 10.

[0141] In one embodiment, the usage scenario includes a non-handheld scenario, and the determination module 1502 is also used to determine the power backoff strategy corresponding to each transmitting antenna in the target antenna group according to the non-handheld scenario, including maintaining the current transmitting power, or performing power backoff with a preset power backoff amount in the non-handheld scenario.

[0142] In one embodiment, the head-hand scenario includes at least one of a left-hand scenario and a right-hand scenario, wherein the determination module 1502 is further used to determine the power backoff strategy for each transmitting antenna in the target antenna group according to the left-hand scenario to perform power backoff with a preset power backoff amount of each transmitting antenna in the left-hand scenario; and to determine the power backoff strategy for each transmitting antenna in the target antenna group according to the right-hand scenario to perform power backoff with a preset power backoff amount of each transmitting antenna in the right-hand scenario. At least one transmitting antenna in the target antenna group has different power backoff amounts in the left-hand scenario and the right-hand scenario.

[0143] In one embodiment, in the target antenna group, at least one of the first transmitting antenna and the second transmitting antenna is located at the top edge of the communication device, and the handheld non-head scenario includes a handheld vertical screen scenario, wherein the determination module 1502 is further used to determine, according to the handheld vertical screen scenario, that the power backoff strategy corresponding to the transmitting antenna located at the top edge of the target antenna group is to maintain the current transmitting power, or to perform power backoff at a preset power backoff amount in the handheld vertical screen scenario; and to determine, according to the handheld vertical screen scenario, that the remaining transmitting antennas in the target antenna group perform power backoff at a preset power backoff amount in the handheld vertical screen scenario. In the handheld vertical screen scenario, the power backoff amount of the transmitting antenna located at the top edge is less than the power backoff amount of the remaining transmitting antennas.

[0144] In one embodiment, in the target antenna group, at least one of the first transmitting antenna and the second transmitting antenna is located on the side of the communication device, and the use scenario includes a handheld horizontal screen scenario, wherein the determination module 1502 is further used to determine, according to the handheld horizontal screen scenario, that the power backoff strategy corresponding to the transmitting antenna located on the side in the target antenna group is to maintain the current power, or to perform power backoff at a preset power backoff amount in the handheld horizontal screen scenario; and to determine, according to the handheld horizontal screen scenario, that the remaining transmitting antennas in the target antenna group perform power backoff at a preset power backoff amount in the handheld horizontal screen scenario. In the handheld horizontal screen scenario, the power backoff amount of the transmitting antenna located on the side is less than or equal to the power backoff amount of the remaining transmitting antennas.

[0145] In one embodiment, the determination module 1502 is further used to determine the usage scenario of the communication device 10 according to the antenna impedance, the device state information and the pre-trained scenario model. The acquisition module 1501 is further used to acquire training samples, train the pre-built initial scenario model according to the training samples, and acquire the trained scenario model. The training samples include the usage scenario of the communication device 10 and the antenna impedance and / or device state information of the corresponding first transmitting antenna.

[0146] In one embodiment, the acquisition module 1501 is further used to acquire the antenna impedance timing and device status timing of the first transmitting antenna within a preset time length, the antenna impedance timing includes the antenna impedance of the first transmitting antenna and the corresponding timestamp, and the device status timing includes the device status information and the corresponding timestamp of the communication device 10. The determination module 1502 is further used to determine the usage scenario of the communication device 10 within the preset time length according to the antenna impedance timing and the device status timing.

[0147] In one embodiment, the determination module 1502 is also used to determine the antenna impedance change of the first transmitting antenna within a preset time length according to the antenna impedance timing. When the antenna impedance change is less than a preset impedance threshold, the usage scenario of the communication device 10 within the preset time length is determined according to the antenna impedance timing and the device status timing.

[0148] In one embodiment, the determination module 1502 is also used to determine the usage scenario corresponding to each timestamp of the communication device 10 within a preset time length according to the antenna impedance timing and the device status timing, and to determine the usage scenario of the communication device 10 within the preset time length when the usage scenario corresponding to each timestamp is the same.

[0149] In one embodiment, the acquisition module 1501 is also used to acquire the forward power and reverse power of the communication device 10 communicating through the first transmitting antenna, determine the reflection coefficient of the first transmitting antenna according to the forward power and the reverse power, and determine the antenna impedance of the first transmitting antenna according to the reflection coefficient.

[0150] In one embodiment, the power back-off device 1500 further includes an adjustment module, which is used to adjust the matching impedance of the tuning circuit 170 in the communication device 10 according to the antenna impedance of the first transmitting antenna; wherein the tuning circuit 170 is connected to the first transmitting antenna.

[0151] Each module in the power backoff device 1500 can be implemented in whole or in part by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0152] Based on the same inventive concept, the embodiment of the present application further provides a communication device 10. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the one or more communication device 10 embodiments provided below can refer to the limitations on the power backoff method above, and will not be repeated here.

[0153] Please continue reading Figure 1 and Fig.11 In one embodiment, a communication device 10 is provided, which includes a target antenna group and a processing circuit 142. The target antenna group includes at least one first transmitting antenna 110 and at least one second transmitting antenna, and the first transmitting antenna 110 and the second transmitting antenna are located at different positions of the communication device 10. The processing circuit 142 is connected to the target antenna group, and the processing circuit 142 is used to obtain the antenna impedance and device status information of the first transmitting antenna 110, determine the use scenario of the communication device 10 according to the antenna impedance and the device status information, determine the power backoff strategy corresponding to each transmitting antenna in the target antenna group according to the use scenario, and control the transmit power of the target antenna group according to the power backoff strategy.

[0154] In one embodiment, the communication device 10 further includes a coupler 120 and a detection circuit 130. The coupler 120 is connected to at least one first transmitting antenna 110, and the coupler 120 is used to obtain a first radio frequency signal transmitted to the first transmitting antenna 110 and a second radio frequency signal from the first transmitting antenna 110. The detection circuit 130 is connected to the coupler 120, and the detection circuit 130 is used to determine the forward power of the communication device 10 according to the first radio frequency signal, and to determine the reverse power of the communication device 10 according to the second radio frequency signal. The processing circuit 142 is also connected to the detection circuit 130, and the processing circuit 142 is also used to determine the reflection coefficient of the first transmitting antenna 110 according to the forward power and the reverse power, and to determine the antenna impedance of the first transmitting antenna 110 according to the reflection coefficient.

[0155] In one embodiment, the communication device includes a top edge 101 and a bottom edge 102 that are relatively arranged, and a first side edge 103 and a second side edge 104 that are relatively arranged, wherein the first transmitting antenna is located at least one of the bottom edge 101, the top edge 102, the first side edge 103 and the second side edge 104; in the target antenna group, the first transmitting antenna and the second transmitting antenna are located on the same side or on two adjacent sides.

[0156] In one embodiment, the communication device includes at least one of an acceleration sensor, a gyroscope sensor, a proximity sensor, and an audio output device, and the device status information includes at least one of acceleration information collected by the acceleration sensor, gyroscope information collected by the gyroscope sensor, distance information collected by the proximity sensor, and working status information of the audio output device.

[0157] In one embodiment, the usage scenario includes a non-handheld scenario, and the processing circuit 142 is also used to determine the power backoff strategy corresponding to each transmitting antenna in the target antenna group according to the non-handheld scenario, including maintaining the current transmitting power, or performing power backoff with a preset power backoff amount in the non-handheld scenario.

[0158] In one embodiment, the head-hand scenario includes at least one of a left-hand scenario and a right-hand scenario, wherein the processing circuit 142 is further used to determine the power backoff strategy for each transmitting antenna in the target antenna group according to the left-hand scenario to perform power backoff with a preset power backoff amount of each transmitting antenna in the left-hand scenario; and to determine the power backoff strategy for each transmitting antenna in the target antenna group according to the right-hand scenario to perform power backoff with a preset power backoff amount of each transmitting antenna in the right-hand scenario. At least one transmitting antenna in the target antenna group has different power backoff amounts in the left-hand scenario and the right-hand scenario.

[0159] In one embodiment, in the target antenna group, at least one of the first transmitting antenna and the second transmitting antenna is located at the top edge of the communication device, and the handheld non-head scenario includes a handheld vertical screen scenario, wherein the processing circuit 142 is further used to determine, according to the handheld vertical screen scenario, that the power backoff strategy corresponding to the transmitting antenna located at the top edge of the target antenna group is to maintain the current transmitting power, or to perform power backoff at a preset power backoff amount in the handheld vertical screen scenario; and to determine, according to the handheld vertical screen scenario, that the remaining transmitting antennas in the target antenna group perform power backoff at a preset power backoff amount in the handheld vertical screen scenario. In the handheld vertical screen scenario, the power backoff amount of the transmitting antenna located at the top edge is less than the power backoff amount of the remaining transmitting antennas.

[0160] In one embodiment, in the target antenna group, at least one of the first transmitting antenna and the second transmitting antenna is located on the side of the communication device, and the use scenario includes a handheld horizontal screen scenario, wherein the processing circuit 142 is further used to determine, according to the handheld horizontal screen scenario, that the power backoff strategy corresponding to the transmitting antenna located on the side in the target antenna group is to maintain the current power, or to perform power backoff at a preset power backoff amount in the handheld horizontal screen scenario; and to determine, according to the handheld horizontal screen scenario, that the remaining transmitting antennas in the target antenna group perform power backoff at a preset power backoff amount in the handheld horizontal screen scenario. In the handheld horizontal screen scenario, the power backoff amount of the transmitting antenna located on the side is less than or equal to the power backoff amount of the remaining transmitting antennas.

[0161] In one embodiment, the processing circuit 142 is further used to determine the usage scenario of the communication device 10 according to the antenna impedance, the device state information and the pre-trained scenario model. The processing circuit 142 is further used to obtain training samples, train the pre-built initial scenario model according to the training samples, and obtain the trained scenario model. The training samples include the usage scenario of the communication device 10 and the antenna impedance and / or device state information of the corresponding first transmitting antenna.

[0162] In one embodiment, the processing circuit 142 is further used to obtain the antenna impedance timing and device status timing of the first transmitting antenna within a preset time length, and determine the usage scenario of the communication device 10 within the preset time length according to the antenna impedance timing and the device status timing. The antenna impedance timing includes the antenna impedance of the first transmitting antenna and the corresponding timestamp, and the device status timing includes the device status information of the communication device 10 and the corresponding timestamp.

[0163] In one embodiment, the processing circuit 142 is also used to determine the antenna impedance change of the first transmitting antenna within a preset time period according to the antenna impedance timing. When the antenna impedance change is less than a preset impedance threshold, the usage scenario of the communication device 10 within the preset time period is determined according to the antenna impedance timing and the device status timing.

[0164] In one embodiment, the processing circuit 142 is also used to determine the usage scenario corresponding to each timestamp of the communication device 10 within a preset time length based on the antenna impedance timing and the device status timing, and determine the usage scenario of the communication device 10 within the preset time length when the usage scenario corresponding to each timestamp is the same.

[0165] In one embodiment, the processing circuit 142 is also used to obtain the forward power and reverse power of the communication device 10 communicating through the first transmitting antenna, determine the reflection coefficient of the first transmitting antenna according to the forward power and the reverse power, and determine the antenna impedance of the first transmitting antenna according to the reflection coefficient.

[0166] In one embodiment, the processing circuit 142 is further configured to adjust the matching impedance of the tuning circuit 170 in the communication device 10 according to the antenna impedance of the first transmitting antenna; wherein the tuning circuit 170 is connected to the first transmitting antenna.

[0167] In one embodiment, a communication device is provided. The communication device may be a server, and its internal structure diagram may be as follows: Fig.16 As shown. The communication device includes a processor, a memory and a network interface connected via a system bus. Among them, the processor of the communication device is used to provide computing and control capabilities. The memory of the communication device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the communication device is used to store data such as scenario models, antenna impedance, and usage scenarios. The network interface of the communication device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a power fallback method is implemented.

[0168] Those skilled in the art will understand that Fig.16 The structure shown in the figure is only a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the communication device to which the scheme of the present application is applied. The specific communication device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0169] In one embodiment, a communication device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps of the aforementioned power backoff method when executing the computer program.

[0170] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the aforementioned power back-off method are implemented.

[0171] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps of the aforementioned power back-off method when executed by a processor.

[0172] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0173] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0174] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0175] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A power backoff method, characterized in that: The power back-off method comprises: Acquire antenna impedance and device status information of at least one first transmitting antenna in the communication device; Determining a usage scenario of the communication device according to the antenna impedance and the device status information; Determine, according to the usage scenario, a power backoff strategy corresponding to each transmitting antenna in a target antenna group in the communication device; wherein the target antenna group includes at least one of the first transmitting antennas and at least one of the second transmitting antennas, and the first transmitting antenna and the second transmitting antenna are located at different positions of the communication device; The transmit power of the target antenna group is controlled according to the power backoff strategy.

2. The power backoff method according to claim 1, characterized in that: In the target antenna group, the first transmitting antenna and the second transmitting antenna are located on the same side or on two adjacent sides, and the usage scenario includes at least one of a non-handheld scenario, a handheld non-head scenario, and a head-hand scenario; wherein the power fallback strategies of each transmitting antenna in the target antenna group are different in the non-handheld scenario and the head-hand scenario.

3. The power backoff method according to claim 2, characterized in that: The usage scenario includes a non-handheld scenario, and determining a power backoff strategy corresponding to each transmitting antenna in a target antenna group in the communication device according to the usage scenario includes: Determining the power backoff strategy corresponding to each transmitting antenna in the target antenna group according to the non-handheld scenario includes maintaining the current transmitting power, or performing power backoff with a preset power backoff amount in the non-handheld scenario.

4. The power backoff method according to claim 2, characterized in that: The head-hand scenario includes at least one of a left head-hand scenario and a right head-hand scenario, wherein determining the power backoff strategy corresponding to each transmitting antenna in the target antenna group in the communication device according to the usage scenario includes: Determining, according to the left-hand scenario, a power backoff strategy for each transmitting antenna in the target antenna group to perform power backoff at a preset power backoff amount of each transmitting antenna in the left-hand scenario; According to the right-hand scenario, the power backoff strategy for each transmitting antenna in the target antenna group is determined to perform power backoff according to the preset power backoff amount of each transmitting antenna in the right-hand scenario; wherein, At least one transmitting antenna in the target antenna group has different power backoff amounts in the left-hand scenario and the right-hand scenario.

5. The power backoff method according to claim 2, characterized in that: In the target antenna group, at least one of the first transmitting antenna and the second transmitting antenna is located at the top edge of the communication device, and the handheld non-head scenario includes a handheld vertical screen scenario, wherein determining the power backoff strategy corresponding to each transmitting antenna in the target antenna group in the communication device according to the usage scenario includes: Determining, according to the handheld vertical screen scenario, a power backoff strategy corresponding to the transmitting antenna located at the top edge in the target antenna group to maintain the current transmitting power, or to perform power backoff at a preset power backoff amount in the handheld vertical screen scenario; According to the handheld vertical screen scenario, the remaining transmitting antennas in the target antenna group are determined to perform power backoff at a preset power backoff amount in the handheld vertical screen scenario; wherein, in the handheld vertical screen scenario, the power backoff amount of the transmitting antenna located at the top edge is less than the power backoff amount of the remaining transmitting antennas.

6. The power back-off method according to claim 5, characterized in that: The handheld vertical screen scenario includes at least one of a left-handed vertical screen scenario and a right-handed vertical screen scenario, wherein at least one transmitting antenna in the target antenna group has different power backoff amounts in the left-handed vertical screen scenario and the right-handed vertical screen scenario.

7. The power back-off method according to claim 2, characterized in that: In the target antenna group, at least one of the first transmitting antenna and the second transmitting antenna is located at a side of the communication device, and the usage scenario includes a handheld horizontal screen scenario, wherein determining a power backoff strategy corresponding to each transmitting antenna in the target antenna group in the communication device according to the usage scenario includes: Determining, according to the handheld horizontal screen scenario, a power fallback strategy corresponding to the transmitting antenna located on the side in the target antenna group to maintain the current power, or to perform power fallback at a preset power fallback amount in the handheld horizontal screen scenario; According to the handheld horizontal screen scenario, the remaining transmitting antennas in the target antenna group are determined to perform power backoff at the preset power backoff amount in the handheld horizontal screen scenario; wherein, in the handheld horizontal screen scenario, the power backoff amount of the transmitting antenna located on the side is less than or equal to the power backoff amount of the remaining transmitting antennas.

8. The power back-off method according to claim 1, characterized in that: The determining a usage scenario of the communication device according to the antenna impedance and the device status information includes: Determine the usage scenario of the communication device according to the antenna impedance, the device state information and a pre-trained scenario model; wherein the scenario model is trained by the following steps: Acquire a training sample, where the training sample includes a usage scenario of the communication device and an antenna impedance of a corresponding first transmitting antenna and / or device status information; The pre-constructed initial scene model is trained according to the training samples, and the trained scene model is obtained.

9. The power back-off method according to claim 1, characterized in that: The obtaining of antenna impedance and device status information of at least one first transmitting antenna in the communication device includes: Acquire an antenna impedance timing sequence and a device state timing sequence of the first transmitting antenna within a preset time length, wherein the antenna impedance timing sequence includes the antenna impedance of the first transmitting antenna and a corresponding timestamp, and the device state timing sequence includes device state information of the communication device and a corresponding timestamp; The determining a usage scenario of the communication device according to the antenna impedance and the device status information includes: A usage scenario of the communication device for a preset time period is determined according to the antenna impedance timing and the device state timing.

10. The power back-off method according to claim 9, characterized in that: The determining, according to the antenna impedance timing sequence and the device state timing sequence, a usage scenario of the communication device for a preset time period includes: Determining an amount of change in antenna impedance of the first transmitting antenna within a preset time period according to the antenna impedance time sequence; When the antenna impedance change is less than a preset impedance threshold, a usage scenario of the communication device for a preset time period is determined according to the antenna impedance timing and the device state timing.

11. The power back-off method according to claim 9, characterized in that: The determining, according to the antenna impedance timing sequence and the device state timing sequence, a usage scenario of the communication device for a preset time period includes: Determining a usage scenario corresponding to each timestamp of the communication device within a preset time period according to the antenna impedance time sequence and the device state time sequence; When the usage scenarios corresponding to each timestamp are the same, the usage scenario of the communication device for the preset time period is determined.

12. The power back-off method according to claim 1, characterized in that: The obtaining of the antenna impedance of at least one first transmitting antenna in the communication device comprises: Acquire forward power and reverse power of the communication device communicating through the first transmitting antenna; Determine a reflection coefficient of the first transmitting antenna according to the forward power and the reverse power; The antenna impedance of the first transmitting antenna is determined according to the reflection coefficient.

13. The power back-off method according to claim 1, characterized in that: The power backoff method further includes: The matching impedance of the tuning circuit in the communication device is adjusted according to the antenna impedance of the first transmitting antenna; wherein the tuning circuit is connected to the first transmitting antenna.

14. A power fallback device, characterized in that: The device comprises: An acquisition module, used to acquire antenna impedance and device status information of at least one first transmitting antenna in a communication device; A determination module, configured to determine a usage scenario of the communication device according to the antenna impedance and the device status information, and determine a power backoff strategy corresponding to each transmitting antenna in a target antenna group in the communication device according to the usage scenario; wherein the target antenna group includes at least one of the first transmitting antennas and at least one of the second transmitting antennas, and the first transmitting antenna and the second transmitting antenna are located at different positions of the communication device; A control module is used to control the transmit power of the target antenna group according to the power backoff strategy.

15. A communication device, characterized in that: The communication device comprises: a target antenna group, comprising at least one first transmitting antenna and at least one second transmitting antenna, wherein the first transmitting antenna and the second transmitting antenna are located at different positions of the communication device; A processing circuit is connected to the target antenna group, and is used to obtain the antenna impedance and device status information of at least one of the first transmitting antennas, determine the usage scenario of the communication device according to the antenna impedance and the device status information, determine the power backoff strategy corresponding to each transmitting antenna in the target antenna group according to the usage scenario, and control the transmission power of the target antenna group according to the power backoff strategy.

16. The communication device according to claim 15, characterized in that The communication device further comprises: a coupler connected to at least one of the first transmitting antennas, and configured to obtain a first radio frequency signal transmitted to the first transmitting antenna and a second radio frequency signal from the first transmitting antenna; a detection circuit connected to the coupler, and configured to determine a forward power of the communication device according to the first radio frequency signal, and to determine a reverse power of the communication device according to the second radio frequency signal; The processing circuit is also connected to the detection circuit, and is further used to determine the reflection coefficient of the first transmitting antenna according to the forward power and the reverse power, and to determine the antenna impedance of the first transmitting antenna according to the reflection coefficient.

17. The communication device according to claim 15, characterized in that The communication device includes a top edge and a bottom edge that are relatively arranged, and a first side edge and a second side edge that are relatively arranged, wherein the first transmitting antenna is located at least one of the bottom edge, the top edge, the first side edge and the second side edge; in the target antenna group, the first transmitting antenna and the second transmitting antenna are located on the same side or on two adjacent sides.

18. The communication device according to claim 15, characterized in that The communication device includes at least one of an acceleration sensor, a gyroscope sensor, a proximity sensor and an audio output device, and the device status information includes at least one of acceleration information collected by the acceleration sensor, gyroscope information collected by the gyroscope sensor, distance information collected by the proximity sensor and working status information of the audio output device.

19. A communication device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 13 are implemented.

20. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 13 are implemented.

21. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 13 are implemented.

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