Reverberation chamber air interface testing method, device and electronic equipment with flexible and adjustable channel parameters

Abstract

The present application provides a reverberation chamber air interface test method, device and electronic equipment with flexible and adjustable channel parameters, which relates to the field of test technology. The method includes: for the inner surface of the reverberation chamber, obtaining the configuration position of the absorbing material to be configured in the inner surface determined by the following methods: determining the number of absorbing materials to be configured on the inner surface; calculating the sampling radius based on the size of the inner surface, the size and number of the absorbing materials; determining the configuration position of the absorbing material in the inner surface based on the sampling radius; and performing air interface testing in the reverberation chamber after the absorbing material is set according to the obtained configuration position. The scheme provided by the embodiment of the present application can be used to configure the absorbing material in the reverberation chamber and perform OTA testing.

Description

Technical Field

[0001] The present application relates to the field of testing technology, and in particular to a reverberation chamber air interface testing method with flexible and adjustable channel parameters. Background Art

[0002] The reverberation chamber is usually composed of a metal shielded cavity with large electrical dimensions and highly conductive reflective walls and one or more stirring paddles installed inside. The rotation of the stirring paddle can change the electromagnetic boundary conditions inside the cavity, thereby forming a statistically isotropic uniform electromagnetic field in the working area inside the cavity. Therefore, in the field of wireless communications, the reverberation chamber can be used for OTA (Over-The-Air) testing of the wireless performance of communication equipment. It mainly involves non-directional technical indicator tests such as TRP (Total Radiated Power) and TIS (Total Isotropic Sensitivity).

[0003] OTA testing based on reverberation chambers has gradually become an important means of testing communication equipment due to its high test efficiency, low cost and ability to simulate complex electromagnetic environments. Therefore, it is necessary to provide a reverberation chamber over-the-air testing method with flexible and adjustable channel parameters. Summary of the invention

[0004] The purpose of this application is to provide a reverberation chamber over-the-air test method with flexible and adjustable channel parameters, so as to configure the absorbing materials in the reverberation chamber and perform OTA testing. The specific technical solution is as follows:

[0005] In a first aspect, an embodiment of the present application provides a reverberation chamber air interface testing method with flexible and adjustable channel parameters, the method comprising:

[0006] For the inner surface of the reverberation chamber, the configuration position of the absorbing material to be configured in the inner surface is obtained by:

[0007] Determining the amount of absorbing material to be configured on the inner surface;

[0008] Calculating a sampling radius based on the size of the inner surface, the size and amount of the absorbing material;

[0009] Based on the sampling radius, determining a configuration position of the absorbing material in the inner surface;

[0010] The air-port test is performed in a reverberation chamber after the absorbing material is set according to the obtained configuration position.

[0011] In a second aspect, an embodiment of the present application provides a reverberation chamber air interface test device with flexible and adjustable channel parameters, the device comprising:

[0012] For the inner surface of the reverberation chamber, the configuration position of the absorbing material to be configured in the inner surface is obtained by the following quantity determination module, radius calculation module and position determination module:

[0013] A quantity determination module, used to determine the quantity of the absorbing material to be configured on the inner surface;

[0014] A radius calculation module, used to calculate the sampling radius based on the size of the inner surface, the size and quantity of the absorbing material;

[0015] A position determination module, used to determine the configuration position of the absorbing material in the inner surface based on the sampling radius;

[0016] The test module is used to perform air interface testing in a reverberation chamber after absorbing materials are set according to the obtained configuration position.

[0017] In a third aspect, an embodiment of the present application provides an electronic device, wherein the electronic device further includes a memory, a transceiver, and a processor:

[0018] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; a processor for reading the computer program in the memory and executing any one of the method steps of the first aspect

[0019] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the method steps described in any one of the first aspects are implemented.

[0020] In a fifth aspect, an embodiment of the present application further provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute any of the methods described in the first aspect above.

[0021] Beneficial effects of the embodiments of the present application:

[0022] In the embodiments of the present application, for the inner surface of the reverberation chamber, the sampling radius can be calculated according to the number and size of the absorbing materials and the size of the inner surface, and the position of the absorbing materials on the inner surface can be allocated based on the sampling radius, so that the absorbing materials can be evenly distributed on the inner surface, that is, the channel parameter of the absorbing material configuration position can be flexibly adjusted. And because the inner surface is configured with absorbing materials, it is possible to effectively utilize the three-dimensional space in the reverberation chamber, increase the number of absorbing materials that can be laid, achieve better absorbing effects, and then increase the adjustable range of channel parameters such as delay width and path parameters in the reverberation chamber, which can better meet the test requirements of terminals with different requirements for channel parameters.

[0023] Furthermore, evenly laying absorbing materials on all inner surfaces can also reduce the degree to which the uniformity of the electromagnetic field at different locations in the working area of ​​the reverberation chamber is destroyed.

[0024] Furthermore, the configuration of the absorbing material matches the actual size of the reverberation chamber. Therefore, the absorbing material configuration scheme provided by the embodiment of the present application can match the reverberation chamber, thereby adaptively achieving the position allocation of the absorbing material in different reverberation chambers. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0026] Figure 1 A schematic diagram of the structure of a reverberation chamber for OTA testing provided in the related art;

[0027] Figure 2 A schematic flow chart of a first method for testing air interface in a reverberation chamber with flexible and adjustable channel parameters provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the configuration position of the first type of absorbing material provided in the embodiment of the present application;

[0029] Figure 4 A schematic diagram of the configuration position of the second absorbing material provided in the embodiment of the present application;

[0030] Figure 5 A schematic flow chart of a second method for testing air interface in a reverberation chamber with flexible and adjustable channel parameters provided in an embodiment of the present application;

[0031] Figure 6 A schematic diagram of the relationship between the amount of absorbing materials and the time delay broadening provided in an embodiment of the present application;

[0032] Figure 7 A schematic diagram of the relationship between the amount of absorbing materials and path loss provided in an embodiment of the present application;

[0033] Figure 8 A schematic diagram of a first air interface test process provided in an embodiment of the present application;

[0034] Fig. 9 A schematic diagram of the first TRP test process provided in the embodiment of the present application;

[0035] Fig.10 A graph showing a received power as the sampling rate increases, provided in an embodiment of the present application;

[0036] Fig.11 A schematic diagram of a second TRP test process provided in an embodiment of the present application;

[0037] Fig.12 A schematic diagram of the first TIS test process provided in the embodiment of the present application;

[0038] Fig.13 A curve diagram showing the variation of packet loss rate with transmission power provided in an embodiment of the present application;

[0039] Fig.14 A schematic diagram of a second TIS test process provided in an embodiment of the present application;

[0040] Fig.15 A schematic diagram of an OTA test process provided in an embodiment of the present application;

[0041] Fig.16 A schematic diagram of the structure of a reverberation chamber air interface test device with flexible and adjustable channel parameters provided in an embodiment of the present application;

[0042] Fig.17 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field based on the present application belong to the scope of protection of the present application.

[0044] In order to compare with the embodiments of the present application, the method of configuring the absorbing material in the reverberation chamber in the related art is first described.

[0045] The reverberation chamber in the related art is often a rectangular parallelepiped, with six inner surfaces all made of metal cavities, without any extra mounting or supporting structures. Therefore, if the reverberation chamber needs to be loaded during OTA testing, the absorbing material can only be placed on the ground.

[0046] See also Figure 1 , which is a structural schematic diagram of a reverberation chamber for OTA testing provided in the related art.

[0047] As can be seen from the figure, the reverberation chamber contains a stirring paddle and a turntable. The turntable is used to place a reference antenna and a DUT (Device under test) for OTA testing. The DUT can be a terminal such as a mobile phone. The reverberation chamber also includes a measurement antenna. The base station simulator is installed outside the reverberation chamber and communicates with the measurement antenna.

[0048] However, since the stirring paddles, antenna brackets, turntables, etc. in the reverberation chamber limit the effective usable area of ​​the ground, the amount of absorbing materials that can be placed is limited. Therefore, as shown in the figure, the absorbing materials are placed on the ground. A small amount of absorbing materials can only limit the adjustable channel parameters such as delay width and path parameters in the environment to a small range. Moreover, the concentrated placement of absorbing materials on the ground will destroy the uniformity of the electromagnetic field in the working area of ​​the reverberation chamber to a certain extent, thereby affecting the OTA test.

[0049] To this end, an embodiment of the present application provides a reverberation chamber air interface testing method with flexible and adjustable channel parameters.

[0050] See also Figure 2 , which is a flow chart of a first reverberation chamber air interface test method with flexible and adjustable channel parameters provided in an embodiment of the present application. First, for the inner surface of the reverberation chamber, the configuration position of the absorbing material to be configured in the inner surface determined by steps S201-S203 is obtained, and then step S204 is executed.

[0051] Specifically, steps S201 - S203 may be performed for each inner surface of the reverberation chamber, or may be performed for only a selected portion of the inner surfaces.

[0052] The reverberation chamber is a rectangular parallelepiped, and the inner surface includes a bottom surface, a top surface, and four walls. It should be noted that the device that performs steps S201-S203 to determine the configuration position may be the same as or different from the execution subject of the embodiment of the present application. For example, the execution subject of the embodiment of the present application is electronic device a, and the OTA test is performed by electronic device a, then the execution subject of steps S201-S203 may be electronic device a, or may be another electronic device.

[0053] S201: Determine the quantity of the absorbing material to be configured on the inner surface.

[0054] In one embodiment of the present application, the above number can be set by the staff based on experience.

[0055] In another embodiment of the present application, before the first OTA test, a variety of different alternative numbers can be pre-set, such as 0, 1, 2, 4, 8, etc. For each alternative number, the configuration position of the alternative number is determined in accordance with the following steps S202-S204, and then the absorbing material is configured according to the determined configuration position, and the channel parameters in the reverberation chamber corresponding to the different alternative numbers are respectively detected using a detection instrument (such as using a vector network analyzer to detect the delay width or path loss, etc.), and the functional relationship between the alternative number and the channel parameter is inferred based on the corresponding relationship between the alternative number and the channel parameter. Afterwards, the staff estimates the required number according to the channel parameter requirements required for the OTA test and the determined functional relationship. If the calculated number is a non-integer, the number can be determined by rounding up or down.

[0056] In addition, the shape of the above-mentioned absorbing material can be square, rectangular, circular or other regular or irregular shapes, and the embodiment of the present application does not limit the shape of the absorbing material.

[0057] The amount of absorbing material disposed on each inner surface may be the same or different.

[0058] S202: Calculate a sampling radius based on the size of the inner surface and the size and quantity of the absorbing material.

[0059] In one embodiment of the present application, the sampling radius may be calculated based on the steps shown below.

[0060]

[0061]

[0062]

[0063] Among them, a and b are two preset parameters, and the values ​​of a and b can be the same or different. For example, a and b are both 1.6, X and Y are calculated intermediate parameters, L is the length of the inner surface, W is the width of the inner surface, S1 and S2 represent the size of the absorbing material, for example, if the absorbing material is a square, S1 and S2 are both the side length of the absorbing material, if the absorbing material is a rectangle, S1 and S2 are respectively the length and width of the absorbing material, if the absorbing material is a circle, S1 and S2 are both the diameter of the absorbing material, N is the number of the above absorbing materials, and R is the calculated sampling radius.

[0064] In another example of the present application, the area of ​​the inner surface can be calculated according to the size of the inner surface, and the area of ​​the absorbing material can be calculated according to the size of the absorbing material. The ratio between the two is calculated, divided by the amount of absorbing material and then divided by π to obtain the sampling radius.

[0065] If the sizes of the absorbing materials are the same, the sampling radii corresponding to the absorbing materials are the same; otherwise, the sampling radii corresponding to the absorbing materials of different sizes are different.

[0066] In another embodiment of the present application, the preset reduction ratio may be reduced based on the inner surface to serve as the size of the inner surface for calculating the sampling radius, and then the sampling radius may be calculated.

[0067] For example, if the preset reduction ratio is 0.8, it is equivalent to reducing the inner surface from a large rectangle to a small rectangle by 0.8 times, and the sampling radius is calculated based on the size of the small rectangle. In this way, some margin can be left at the edge of the inner surface, and then the configuration position can be planned, which can ensure that the absorbing material will not be blocked by the inner wall of the reverberation chamber when it is set, and the absorbing material can be effectively set.

[0068] S203: Based on the sampling radius, determine the configuration position of the absorbing material in the inner surface.

[0069] In one embodiment of the present application, the configuration positions of the absorbing materials may be determined in sequence, and the distance between the center of each absorbing material and the center of the previous absorbing material is greater than or equal to the sampling radius corresponding to the absorbing material.

[0070] In another embodiment of the present application, the positions of the absorbing materials may be randomly arranged when the distance between the centers of any two absorbing materials is greater than the maximum value of the sampling radii corresponding to the two absorbing materials.

[0071] In another embodiment of the present application, there is the following rule A: for each absorbing material, after configuration, the center of the absorbing material is taken as the center of the circle and the sampling radius is taken as the radius, and there is no center of other absorbing materials in the circular area, and the ratio of the area of ​​the union of the circular areas corresponding to all absorbing materials to the area of ​​the inner surface reaches a preset ratio.

[0072] In this case, each absorbing material can be configured in sequence. After configuring the position of an absorbing material, a circular area with the center of the absorbing material as the center and the sampling radius as the radius is determined. Then, the center of the next absorbing material is configured outside the determined circular area, and then the circular area corresponding to the newly configured absorbing material is determined, and so on, the position of each absorbing material is determined. If there is no space for configuring a new absorbing material, the position of the configured absorbing material is adjusted until the configuration position of each absorbing material is determined. Afterwards, it is determined whether the ratio of the area of ​​the union of the circular areas corresponding to all absorbing materials to the area of ​​the inner surface reaches a preset ratio. If not, the position of the absorbing material is continuously adjusted until the above requirements are met.

[0073] Alternatively, the configuration position of the absorbing material can be calculated based on the sampling radius using the Poisson disk sampling method.

[0074] Since the absorbing materials can maintain a certain distance after configuration, the absorbing materials can be evenly distributed on the inner surface. In addition, since the ratio of the area of ​​the union of the circular areas corresponding to all absorbing materials to the area of ​​the inner surface reaches a preset ratio, the absorbing materials occupy a large proportion on the inner surface, achieving effective coverage of the absorbing materials on the inner surface.

[0075] In another embodiment of the present application, any of the above methods can be used to determine the positions of multiple groups of absorbing materials, and the staff can perform subsequent manual screening. In addition, since there are objects such as a turntable, an antenna bracket, and a stirring paddle in the reverberation chamber, which may hinder the configuration of the absorbing material, if the absorbing material conflicts with the objects in the reverberation chamber, the above method can be used to adaptively adjust the configuration position.

[0076] In the case of rule A, there is the following example. For the inner surface of 3.6m long and 2.8m wide, a square absorbing material with a side length of 0.6m is configured. Figure 3 and Figure 4 There are two cases corresponding to the configuration of 3 and 5 absorbing materials respectively.

[0077] See also Figure 3 , is a schematic diagram of the configuration position of the first absorbing material provided in an embodiment of the present application.

[0078] See also Figure 4 , is a schematic diagram of the configuration position of the second absorbing material provided in an embodiment of the present application.

[0079] The square dotted frame in the two figures is the absorbing material, the point in the square dotted frame is its center, the circular dotted frame is the circular area corresponding to each absorbing material, the large rectangular solid frame is the inner surface, and the small rectangular solid frame is the small rectangle obtained by reducing the inner surface inward by 0.8 times.

[0080] It should be noted that Figure 3 and Figure 4 These are just two embodiments, and the present application does not limit the size of the inner surface, the size and shape of the absorbing material, and the position of the absorbing material after configuration.

[0081] S204: Performing an air interface test in a reverberation chamber after arranging the absorbing material according to the determined configuration position.

[0082] When performing air interface testing, you need to install the reference antenna, DUT, and measurement antenna in the reverberation chamber, and connect the measurement antenna to the base station simulator. The reference antenna and DUT are placed on the workbench and are kept at least a quarter wavelength away from the wall, stirring paddle, and other metal objects, and avoid the reference antenna facing the DUT and measurement antenna.

[0083] The air interface tests performed may include TRP tests and / or TIS tests. TRP tests are transmission performance tests of the DUT, i.e., the DUT is in transmission mode and the base station simulator receives power through the measurement antenna. TIS tests are reception performance tests of the DUT, i.e., the DUT is in reception mode and the base station simulator transmits signals through the measurement antenna.

[0084] The TRP test and / or TIS test in the embodiments of the present application can be performed in the manner of the relevant technology, or can be performed through the embodiments shown below, which will not be described in detail here.

[0085] In the embodiments of the present application, for the inner surface of the reverberation chamber, the sampling radius can be calculated according to the number and size of the absorbing material and the size of the inner surface, and the position of the absorbing material on the inner surface can be allocated based on the sampling radius, so that the absorbing material can be evenly distributed on each inner surface. And because each inner surface is equipped with absorbing material, it is possible to effectively utilize the three-dimensional space in the reverberation chamber, increase the number of absorbing materials that can be laid, achieve better absorbing effect, and then increase the adjustable range of channel parameters such as delay width and path parameters in the reverberation chamber, which can better meet the test requirements of terminals with different requirements for channel parameters.

[0086] Furthermore, evenly laying absorbing materials on all inner surfaces can also reduce the degree to which the uniformity of the electromagnetic field at different locations in the working area of ​​the reverberation chamber is destroyed.

[0087] Furthermore, the configuration of the absorbing material matches the actual size of the reverberation chamber. Therefore, the absorbing material configuration scheme provided by the embodiment of the present application can match the reverberation chamber, thereby adaptively achieving the position allocation of the absorbing material in different reverberation chambers.

[0088] In order to achieve a better configuration effect of the absorbing material, see Figure 5 , which is a flow chart of a second reverberation chamber air interface test method with flexible and adjustable channel parameters provided in an embodiment of the present application, in which, with respect to the inner surface of the reverberation chamber, a configuration position of an absorbing material to be configured on the inner surface is determined, and after step S203, the following steps S205-S207 are also included.

[0089] S205: After configuring the absorbing material according to the determined configuration position, obtain the current measurement result.

[0090] The above measurement results include: a quality index representing the quality of the multipath transmission channel of the current reverberation room and / or a uniformity index representing the uniformity of the electromagnetic field at different positions of the current reverberation room.

[0091] In the process of measuring and obtaining the measurement results, the stirring paddle in the reverberation chamber can be in a stirring state, so that the obtained measurement results can better reflect the actual situation when the stirring paddle actually rotates during the OTA test using the reverberation chamber.

[0092] The above-mentioned quality indicators may include the delay spread and / or path loss of the reverberation chamber. Specifically, if the impeller is in a rotating state, a vector network analyzer may be used to measure the frequency response at different blade positions, and then the above-mentioned delay spread and / or path loss may be calculated based on an algorithm in the relevant technology.

[0093] The uniformity index can be used to measure the field strength in the three-axis directions at the eight vertices in the reverberation chamber during the rotation of the stirring paddle, determine the maximum field strength in the three-axis directions of the eight vertices during one rotation of the stirring paddle, obtain 8×3 maximum values ​​in total of 24, calculate the standard deviation of the maximum value, and obtain the uniformity index.

[0094] S206: Determine whether the current electromagnetic environment of the reverberation room represented by the measurement result meets the preset requirements.

[0095] The above preset requirements are set by the staff according to the actual needs of OTA testing. For example, the delay width is often required to be below a certain value, such as less than 310ns, the path loss requirement can be less than 40dB, and the uniformity requirement can meet the requirements of IEC (International Electrotechnical Commission) 61000-4-21, less than 3dB in an environment above 400MHz, etc.

[0096] If the preset requirements are met, it means that the current configuration of the absorbing material can meet the requirements of the OTA test, and the final configuration position of the absorbing material is obtained.

[0097] If the preset requirements are not met, the configuration of the absorbing material needs to be adjusted, and step S207 is executed.

[0098] S207: Adjusting the amount of absorbing material to be configured on the inner surface.

[0099] Specifically, in theory, as the number of absorbing materials increases, the delay width becomes smaller and the path loss becomes larger. Therefore, if the delay width is greater than the demand, the number of absorbing materials can be increased. If the path loss is greater than the demand, the number of absorbing materials can be reduced. When the two requirements conflict, the delay width requirement is usually prioritized.

[0100] Figure 6 A schematic diagram of the relationship between the amount of absorbing materials and the delay broadening provided in an embodiment of the present application.

[0101] In the figure, the horizontal axis represents different frequencies in the reverberation chamber, the vertical axis represents the time delay width, and the three curves from top to bottom correspond to 0 absorbing materials, 10 absorbing materials, and 20 absorbing materials respectively.

[0102] As can be seen from the figure, when the frequency is 2.4GHz, if no absorbing material is configured, the delay width is about 310ns, after loading 10 pieces of absorbing material, it becomes 110ns, and after loading 20 pieces of absorbing material, it becomes about 70ns. Therefore, if the delay width needs to be adjusted between 70ns and 310ns, it is necessary to load 1 to 20 pieces of absorbing material on the inner surface of the reverberation chamber.

[0103] Figure 7 A schematic diagram of the relationship between the amount of absorbing material and path loss provided in an embodiment of the present application.

[0104] In the figure, the horizontal axis represents different frequencies in the reverberation chamber, the vertical axis represents the time delay width, and the three curves from top to bottom correspond to 20 absorbing materials, 10 absorbing materials, and 0 absorbing materials respectively.

[0105] As can be seen from the figure, when the frequency is 2.4GHz, if no absorbing material is configured, the path loss is about 34dB, after loading 10 pieces of absorbing material, it becomes about 39dB, and after loading 20 pieces of absorbing material, it becomes about 42dB. Therefore, if the path loss needs to be adjusted between 34dB-39dB, it is only necessary to load 1 to 10 pieces of absorbing material inside the reverberation chamber.

[0106] Return to execute the above steps S202-S206 until the electromagnetic environment of the current reverberation chamber represented by the measurement result meets the preset requirements, and the final configuration position of the absorbing material is obtained.

[0107] As can be seen from the above, in the embodiment of the present application, after completing the position configuration of the absorbing material once, the actual situation of the reverberation chamber will be tested to determine whether the current reverberation chamber can meet the preset requirements. If the preset requirements cannot be met, the amount of absorbing material will continue to be adjusted until the preset requirements are met. Thus, the result of the OTA test using the configured reverberation chamber can meet the test standards.

[0108] In another embodiment of the present application, the absorbing material is fixed to one side of a substrate, and an adsorption component capable of being adsorbed to the inner surface of the reverberation chamber is fixed to the other side of the substrate.

[0109] Among them, the absorbing material is a pointed absorbing material, and the above-mentioned substrate can be a wooden board, a rigid plastic board or a metal board, etc. The above-mentioned adsorption component can be a suction cup or a magnetic material, such as a magnet, etc. Since the material of the reverberation chamber is metal, the absorbing material installed with the magnetic material can be adsorbed on the inner surface of the reverberation chamber. Adding a substrate and an adsorption component to the absorbing material in the above manner will make the absorbing material easy to install, and when unloading, it only needs to be lifted along the edge of the absorbing material to remove it, which is very convenient. It is suitable for application scenarios in which the position of the absorbing material needs to be frequently adjusted in the embodiments of the present application.

[0110] In addition, the absorbing material can also be set on the inner surface of the reverberation chamber by other means such as gluing, screws, nails, hooks, etc.

[0111] After the configuration position of the absorbing material on each inner surface is determined by the aforementioned embodiment, a measurement antenna, a reference antenna and a DUT are configured in the reverberation chamber after the absorbing material is set according to the obtained configuration position, and the measurement antenna is communicatively connected to the base station simulator. In addition, during the air interface test, the reference antenna is connected to a load, for example, a load of 50Ω. In this case, the aforementioned step S204 can be implemented by the embodiment shown below to perform the air interface test.

[0112] See also Figure 8 , which is a flow chart of the first air interface test provided in an embodiment of the present application, including the following steps S801-S803.

[0113] S801: Obtaining the frequency response between the base station simulator port and the reference antenna, the mismatch of the reference antenna, and the radiation efficiency of the reference antenna measured during the rotation of the stirring paddle in the reverberation chamber.

[0114] In one embodiment of the present application, a vector network analyzer can be connected between the RF cable originally connected to the base station simulator (i.e., the RF cable originally connected to the base station simulator is disconnected and connected to the vector network analyzer instead) and the feeding port of the reference antenna to measure the frequency response between the base station simulator port and the reference antenna port.

[0115] The mismatch of the reference antenna is obtained by measuring the reflection coefficient or standing wave of the reference antenna.

[0116] The radiation efficiency of the reference antenna can be measured by a two-antenna method based on a cavity reverberation chamber (i.e., a reverberation chamber without absorbing materials) and a vector network analyzer, or by a comparison method. The radiation efficiency of the reference antenna can be measured by relevant technologies, which will not be described in detail here.

[0117] S802: Based on the frequency response, mismatch and radiation efficiency, calculate a reference power transfer parameter between the base station simulator port and the reference antenna feed port.

[0118] Base Station Simulator Port (i.e. Figure 1 A) and the reference antenna port (i.e. Figure 1 The reference power transfer parameter between C) in the figure represents the transmission between the base station simulator port and the reference antenna port, which can be called the generalized reference power transfer parameter , characterizing the transmission from the base station simulator port to the reference antenna feed port, which contains Figure 1 The air interface transmission between B and C in the reverberation room shown , also includes a base station simulator and a measurement antenna (i.e. Figure 1 The transmission of RF cable between A and B And measure the antenna mismatch , and the radiation efficiency of the measured antenna .

[0119] In one embodiment of the present application, the distance between the base station simulator and the reference antenna (i.e. Figure 1 Reference power transfer parameters between A and C as shown:

[0120]

[0121] in, is the reference power transfer parameter, N is the number of different positions of the stirring paddle, n is the number of different positions of the stirring paddle, F is the number of frequency points in the bandwidth, f is the number of each frequency point, is the frequency response between the base station simulator port and the reference antenna when the stirring paddle is at the position numbered n and the frequency is the frequency point numbered f, is the mismatch of the reference antenna, is the radiation efficiency of the reference antenna.

[0122] S803: Perform air interface testing and calculate TRP test results and / or TIS test results based on the above reference power transfer parameters.

[0123] In one embodiment of the present application, the TRP test results are calculated by following step A.

[0124] Step A: obtaining a plurality of received powers of the base station simulator measured during the rotation of the stirring paddle in the reverberation chamber; and calculating the TRP test result based on the plurality of received powers and the reference power transfer parameter.

[0125] The TRP test results can be calculated according to the following formula.

[0126]

[0127] in, is the TRP test result, N is the number of different positions of the stirring paddle, n is the number of different positions of the stirring paddle, is the received power of the base station simulator during the test, is the reference power transfer parameter.

[0128] That is, the received power of the base station simulator during the test is arithmetic averaged, and then the reference power transfer parameter is removed to obtain the TRP test result.

[0129] In another embodiment of the present application, the TIS test result is calculated by following step B.

[0130] Step B: obtaining a plurality of transmission powers of the base station simulator measured during the rotation of the stirring paddle in the reverberation chamber; and calculating the TIS test result based on the plurality of transmission powers and the reference power transfer parameter.

[0131] The TIS test result can be calculated according to the following formula.

[0132]

[0133] in, For TIS test results, is the reference power transfer parameter, N is the number of different positions of the stirring paddle, n is the number of different positions of the stirring paddle, is the transmitting power of the base station simulator when the stirring paddle is at position numbered n.

[0134] This is equivalent to harmonically averaging the transmission power of the base station simulator according to the number of paddle positions, and then removing the reference power transmission parameter to obtain the TIS test result.

[0135] In one embodiment of the present application, during the TIS test, the base station simulator is configured to establish an air interface connection with the DUT, and the base station simulator is configured to work in the backhaul mode in the service channel, so that the base station simulator can measure the bit error rate or throughput rate. The base station simulator outputs at a preset transmission power in the initial state, and measures the bit error rate or throughput rate in this case. According to the current bit error rate or throughput rate, the transmission power of the base station simulator is adjusted until the measured bit error rate is lower than the preset bit error rate, or the throughput rate is higher than the preset throughput rate, and a In addition, when the transmission power of the base station simulator is close to the nominal sensitivity of the DUT, the step size of each adjustment of the transmission power should not be greater than the preset step size to prevent the single adjustment of the transmission power from being too large, resulting in a large change in the bit error rate or throughput. The above preset step size can be 0.5dB, 0.3dB, etc.

[0136] When the stirring blade is at different positions, the above method is used to obtain the In one embodiment, the stirring blade can be rotated continuously. The collection can also be done by step stirring. Then control the stirring paddle to rotate to the next position and then proceed to the next Collection of.

[0137] In order to reflect the difference between the method of calculating the TRP test results and the TIS test results in the embodiment of the present application and the calculation method in the related art, the method of calculating the TRP test results and the method of calculating the TIS test results in the related art are described below respectively.

[0138] The OTA test in the related technology is mainly divided into two stages: calibration and testing. The testing stage includes TRP testing and TIS testing.

[0139] (I) The calibration phase mainly involves the reference power transfer parameters between the measurement antenna and the reference antenna. Perform calibration. The calibration process includes the following steps C1-C5.

[0140] Step C1: Follow Figure 1 The reverberation chamber is configured as shown, and the vector network analyzer is calibrated.

[0141] Step C2: Place the reference antenna and DUT on the workbench and ensure that they are at least a quarter wavelength away from the wall, stirring paddle, and other metal objects. Avoid facing the reference antenna toward the DUT and measurement antenna.

[0142] Step C3: Loading absorbing material according to a given coherent bandwidth.

[0143] Step C4: Using a vector network analyzer, complete the frequency response detection between the measurement antenna and the reference antenna covering the full frequency bandwidth in a complete stirring process.

[0144] The so-called coverage of the full-band bandwidth means that the frequency response detection covers each frequency point in the working bandwidth of the device.

[0145] The frequency response between the measurement antenna and the reference antenna is Figure 1 Frequency response between B and C.

[0146] Step C5: Calculate the reference power transfer parameter between the measurement antenna and the reference antenna according to the following formula: .

[0147]

[0148] in, is the reference power transfer parameter between the measurement antenna and the reference antenna, N is the number of different positions of the stirring paddle, n is the number of different positions of the stirring paddle, F is the number of frequency points in the bandwidth, f is the number of each frequency point, is the frequency response between the measurement antenna and the reference antenna when the stirring paddle is at the position numbered n and the frequency is the frequency point numbered f, To measure the antenna mismatch, is the mismatch of the reference antenna, To measure the radiation efficiency of an antenna, is the radiation efficiency of the reference antenna.

[0149] That is, the square average of the modulus value of the frequency response between the measurement antenna and the reference antenna is taken according to the number of frequency points F in the bandwidth and the number of stirring paddle positions N, and the reference power transfer parameter is obtained after removing the mismatch and radiation efficiency between the measurement antenna and the reference antenna.

[0150] When performing a TRP test, the DUT transmits a signal and the base station simulator receives power through the measurement antenna. The test process includes the following steps D1 to D4.

[0151] Step D1: Keep the configuration in the reverberation chamber the same as in the calibration phase and connect the reference antenna to a 50Ω load.

[0152] Step D2: Control the base station simulator to establish an air interface connection with the DUT, and control it to transmit signals at maximum power in the service channel.

[0153] Step D3: Measure the received power using a base station simulator at different propeller positions .

[0154] Step D4: Calculate the TRP test result according to the following formula.

[0155]

[0156] Compared with the previous formula, this formula adds new parameters is the transmission of the RF cable between the base station simulator and the measurement antenna. Figure 1 The transmission of RF cable between A and B.

[0157] The method used in the embodiments of the present application described above to calculate The formula is:

[0158]

[0159] It can be seen that compared with the related art, the calculation in the embodiment of the present application The method is simpler.

[0160] In addition, the calculation in the embodiment of the present application The formula is:

[0161]

[0162] That is, only the frequency response between the base station simulator port and the reference antenna needs to be measured (i.e. Figure 1 The frequency response between A and C in the figure), the mismatch of the reference antenna and the radiation efficiency of the reference antenna can be calculated. .

[0163] In the related technology, calculation , it is necessary to calibrate the frequency response between the measurement antenna and the reference antenna mentioned above (i.e. Figure 1 The frequency response between B and C in the calculation), the mismatch of the measurement antenna, the mismatch of the reference antenna, the radiation efficiency of the measurement antenna, and the radiation efficiency of the reference antenna. Additional measurements are required before (Right now Figure 1 Transmission of RF antennas between A and B).

[0164] It can be seen that the relevant technology is used to calculate The parameters that need to be measured in the process are obviously more than those calculated in the embodiment of the present application. The parameters to be measured do not need to be recalibrated for the mismatch and radiation efficiency of the measurement antenna and the transmission of the RF cable between the base station simulator and the measurement antenna. It is not only simpler, but also because the number of parameters that need to be measured is reduced, the possibility of errors in the measurement process is reduced, that is, the number of uncertainty components is reduced, which can improve the accuracy and reliability of the final TRP test results.

[0165] When performing a TIS test, the base station simulator transmits a signal through a measurement antenna and the DUT receives the signal. The test process includes the following steps E1 to E6.

[0166] Step E1: Keep the configuration in the reverberation chamber the same as in the calibration phase and connect the reference antenna to a 50Ω load.

[0167] Step E2: Control the base station simulator to establish an air interface connection with the DUT, and configure the base station simulator to work in a backhaul mode on the service channel, so as to be able to perform a bit error rate or throughput rate test.

[0168] Step E3: Set the base station simulator to output a specific power and perform bit error rate or throughput rate measurement.

[0169] Step E4: Increase or decrease the transmission power of the base station simulator as needed, and repeat steps E3-E4 until the measured bit error rate is not lower than the preset bit error rate, or the measured throughput rate is not higher than the preset throughput rate, and record the transmission power of the base station simulator at this time. .

[0170] Step E5: Execute steps E2 to E4 at different stirring paddle positions.

[0171] Step E6: Calculate the TIS test result according to the following formula.

[0172]

[0173] in, This is the TIS test result. The other parameters in the formula have been described in the previous article and will not be repeated here.

[0174] Correspondingly, the formula for calculating the TIS test result in the embodiment of the present application is:

[0175]

[0176] It can be seen that compared with the related art, the calculation in the embodiment of the present application The method is simpler. Need to be based on ,calculate It is necessary to calibrate the frequency response between the measurement antenna and the reference antenna, the mismatch of the measurement antenna, the mismatch of the reference antenna, the radiation efficiency of the measurement antenna, and the radiation efficiency of the reference antenna. Additional measurements are required before .

[0177] Calculated using relevant technology The parameters that need to be measured in the process are also significantly more than those calculated in the embodiment of the present application. The parameters to be measured. The method provided in the embodiment of the present application does not require recalibration of the mismatch and radiation efficiency of the measurement antenna and the transmission of the RF cable between the base station simulator and the measurement antenna. It is also simpler and can improve the accuracy and reliability of the final TIS test results.

[0178] As can be seen from the above, compared with the related art, whether it is a TRP test or a TIS test, the method of testing using the solution provided in the embodiment of the present application is more convenient, which can reduce the number of parameters that need to be measured and reduce the amount of calculation. It can also reduce the uncertainty of the measured parameters and improve the accuracy and reliability of the final OTA test results.

[0179] Furthermore, in order to improve the stability of the TRP test results, the TRP test can be performed according to the following embodiments.

[0180] See also Fig. 9 , which is a flow chart of the first TRP test provided in an embodiment of the present application, including the following steps S901-S905.

[0181] S901: Obtaining the received power of the base station simulator measured during the rotation of the stirring paddle in the reverberation chamber.

[0182] Among them, different received powers are measured when the stirring paddle is at different positions.

[0183] In one embodiment of the present application, the stirring paddle in the reverberation chamber can be continuously in a rotating state, and the base station simulator can continuously measure the received power during this period. The execution body of the embodiment of the present application can periodically read the received power according to a preset sampling interval.

[0184] In another embodiment of the present application, each time the stirring paddle in the reverberation chamber rotates, the base station simulator measures the received power once. After the execution subject of the embodiment of the present application receives the received power once and performs the following calculations, it controls the stirring paddle to rotate next time until step S904 is executed.

[0185] S902: Whenever a received power is obtained, calculate an average value of the received power and other received powers obtained previously.

[0186] S903: Determine the maximum value of the absolute values ​​of the differences between the new average value and a first preset number of average values ​​obtained historically.

[0187] If the historical average value does not reach the first preset number, step S903 may not be executed, a new received power may be directly obtained, and the process returns to step S902. This ensures that sufficient data has been collected before calculating the TRP test result in the embodiment of the present application, and a sufficient average value has been calculated before the TRP test result is calculated.

[0188] If the historical average value has reached the first preset number, execute step S903 to calculate the difference between the new average value and the first preset number of average values ​​obtained from the historical average values ​​with the time closest to the current time, then calculate the absolute value of the difference, and then select the maximum value therefrom.

[0189] For example, the first preset number is 5, 10, 15, etc.

[0190] S904: If the new maximum value is less than the first preset threshold, the TRP test result is calculated based on the obtained receiving power.

[0191] If the new maximum value is less than the first preset threshold, it means that as the received power continues to be obtained, the fluctuation of the calculated average value is small, and the received power tends to be stable, then the TRP test result can be calculated. Specifically, the TRP test result calculation method can refer to the above or be calculated using the method in the relevant technology, and the embodiment of the present application does not limit this.

[0192] For example, the first preset threshold may be 0.3 dB, 0.1 dB, etc.

[0193] S905: If the new maximum value is not less than the first preset threshold, a new receiving power is obtained.

[0194] If the new maximum value is not less than the first preset threshold, it means that the received power has not yet stabilized, and the received power collected when the stirring paddle rotates to the next position is continued to be obtained, and the process returns to start from step S902.

[0195] From the above, it can be seen that in the solution provided in the embodiment of the present application, before calculating the TRP test results, a series of average value calculations will be performed first. The TRP test results will be calculated only when the difference between the calculated average values ​​is small, that is, when the received power tends to be stable, thereby ensuring the accuracy of the TRP test results.

[0196] Furthermore, since there may be abnormal received powers in the obtained received powers, which will affect the TRP test results, after each received power is obtained, before calculating the average value of the received power and other received powers obtained previously, the following steps F-G can be performed.

[0197] Step F: Determine whether the newly obtained received power is abnormal.

[0198] If so, execute step G; otherwise, directly calculate the average value of the received power and other previously obtained received powers.

[0199] In one case, if the base station simulator and the DUT lose connection temporarily, resulting in a reading timeout or no reading, the received power will usually be set to a default value, which is often 0 or other preset upper or lower limits of the received power, so that the program can continue to run and the entire test process will not be affected by the failure of individual received powers to be sampled normally.

[0200] Therefore, when the received power is the default value, it can be determined that the received power is abnormal.

[0201] Or when the base station simulator obtains abnormal receiving power, the base station simulator will feedback NaN (Not a Number) or an error code to the execution subject of the embodiment of the present application, indicating that the return value is abnormal.

[0202] Furthermore, the execution subject of the embodiment of the present application can also determine whether the received power obtained exceeds the preset normal range, and if so, determine that the received power is abnormal. The above-mentioned preset normal range can be a fixed range, or it can change with the calculated average value. For example, the middle value of the preset normal range can be the latest calculated average value, and the interval length of the preset normal range is a preset length.

[0203] Step G: Remove the received power and wait for the next received power.

[0204] In addition, after the received power of the base station simulator is obtained each time, a power curve of the received power is drawn in real time.

[0205] See also Fig.10 , which is a power curve diagram of received power provided in an embodiment of the present application.

[0206] The horizontal axis in the figure is the number of samples, a total of 100, that is, the number of the received power collected, and the vertical axis is the received power. The asterisk represents the received power obtained. The line between the asterisks represents the power curve. The asterisk points not connected by the power curve correspond to abnormal received power. The figure shows 4 abnormal received powers, all of which are 0dBm.

[0207] The curve where the circle fluctuates between -2dBm and -6dBm represents the average value curve of all received powers. The circle represents the convergence point, which means that after obtaining the number of received powers corresponding to the convergence point, according to the above Fig. 9 The maximum value calculated in the illustrated embodiment is less than the first preset threshold.

[0208] The curve where the triangle is located, which fluctuates between -4dBm and -8dBm, is the average value curve of the remaining received power after removing the abnormal received power. The triangle represents the convergence point, which means that after removing the abnormal received power, after obtaining the number of sampled received powers corresponding to the convergence point, according to the above Fig. 9 The maximum value calculated in the illustrated embodiment is less than the first preset threshold.

[0209] As can be seen from the figure, when the abnormal received power is removed, the received power has converged after the 34th received power acquisition, and the TRP test result can be calculated. The received power at the convergence point is -6.09dBm, and the total average received power obtained by sampling 100 times is -5.93dBm. The absolute value of the difference between the two is less than 0.2dB, that is, even if the received power is stopped after the 34th received power acquisition, the calculated average value is not much different from the average value calculated after receiving the received power 100 times. Therefore, even if the received power is stopped earlier and a smaller amount of received power is used for TRP test, it will not have a significant impact on the TRP test result.

[0210] However, if the abnormal received power is not removed, the difference between the abnormal received power and the normal received power is large, which will increase the fluctuation of the received power and reduce the speed of the received power convergence. As shown in the figure, the received power converges only after the 64th received power collection. Compared with removing the abnormal received power, more received power needs to be received to perform the TRP test, which reduces the efficiency of the TRP test.

[0211] As can be seen from the figure, the average value curve generated after removing the abnormal received power is significantly different from the average value curve generated without removing the abnormal received power. It can be seen that the abnormal received power will cause the calculated average value to be offset. Affected by the abnormal value, the calculated average value is actually not accurate. As shown in the previous article, the process of calculating the TRP test result also needs to calculate the average value of the received power. The TRP test result calculated using an inaccurate average value is also inaccurate.

[0212] From the above, it can be seen that in the embodiment of the present application, the average value is calculated after removing the abnormal received power, and then the TRP test result is calculated, so as to speed up the convergence of the average value and improve the accuracy of the TRP test result.

[0213] See also Fig.11 , which is a flow chart of the second TRP test provided in an embodiment of the present application.

[0214] In the TRP test, the DUT is first configured to work in the transmit mode, and then the received power of the base station simulator is read ( ), determine the received power ( ) is abnormal, if so, remove the received power, then control the stirring blade to rotate, and continue to read the received power of the base station simulator If not, calculate the arithmetic mean of the received power and the previous i received powers ( ).

[0215] After that, the arithmetic mean is calculated ( ) and the first M arithmetic mean ( to )The maximum absolute value of the difference ( ).

[0216] Determine the maximum value ( ) is less than the first preset threshold, and j is greater than M.

[0217] If yes, the TRP test result is calculated. If no, the stirring blade is controlled to rotate.

[0218] In addition, in order to improve the stability of the TIS test results, the TIS test may be performed according to the following embodiments.

[0219] See also Fig.12 , which is a flow chart of the first TIS test provided in an embodiment of the present application, including the following steps S1201-S1208.

[0220] S1201: Obtaining a communication anomaly value detected by the DUT during the process of the DUT receiving a signal sent by the base station simulator while the stirring paddle in the reverberation chamber is rotating.

[0221] The above communication abnormal value is a bit error rate or a packet loss rate.

[0222] The above-mentioned communication abnormality value can be transmitted back to the base station simulator after the DUT detection, and then read from the base station simulator by the execution subject of the embodiment of the present application.

[0223] S1202: If the new communication abnormality value is not greater than the second preset threshold value, and the current power step is greater than 0, control the transmission power of the base station simulator to subtract the current power step, and wait to obtain a new communication abnormality value.

[0224] It should be noted that the initial transmission power and initial power step of the base station simulator can be preset. For example, the initial power step is 4dB, 5dB, etc., and the initial transmission power is -25dBm, -30dBm, etc.

[0225] If the new communication abnormality value is not greater than the second preset threshold, it means that the current communication condition of the DUT is good, and the transmission power of the base station simulator can be appropriately reduced. Therefore, when the power step is greater than 0, the transmission power of the base station simulator can be controlled to subtract the current power step, so that the transmission power decreases.

[0226] For example, the second preset threshold may be 10%, 15%, etc.

[0227] S1203: If the new communication abnormality value is not greater than the above-mentioned second preset threshold value, and the current power step is less than 0, the power step is updated to the inverse of the current power step multiplied by the preset multiple, and the transmission power of the above-mentioned base station simulator is controlled to be subtracted from the updated power step, and wait for a new communication abnormality value.

[0228] The preset multiple is greater than 0 and less than 1. For example, the preset multiple may be 0.5 times, 0.6 times, and the like.

[0229] If the new communication abnormality value is not greater than the second preset threshold, it means that the current communication condition of the DUT is good, and the transmission power of the base station simulator can be appropriately reduced. Therefore, when the power step is less than 0, the power step can be multiplied by a preset multiple to reduce the absolute value of the power step, and then the opposite is taken to make the power step positive. Then the power step is subtracted from the current transmission power to reduce the transmission power.

[0230] S1204: If the new communication abnormality value is greater than the second preset threshold value and the current power step is less than 0, the transmission power of the base station simulator is controlled to be reduced by the current power step, and a new communication abnormality value is waited to be obtained.

[0231] If the new communication abnormality value is greater than the second preset threshold, it means that the current communication condition of the DUT is poor, and the transmission power of the base station simulator can be appropriately increased. Therefore, when the power step is less than 0, the transmission power of the base station simulator can be controlled to subtract the current power step, so that the transmission power increases.

[0232] S1205: If the new communication abnormality value is greater than the above-mentioned second preset threshold value, and the current power step is greater than 0, then when the current power step is greater than the third preset threshold value, the power step is updated to the opposite of the current power step multiplied by the preset multiple, and the transmission power of the above-mentioned base station simulator is controlled to be subtracted from the updated power step, and wait for the new communication abnormality value to be obtained; when the current power step is not greater than the third preset threshold value, the current transmission power of the above-mentioned base station simulator is recorded.

[0233] If the new communication anomaly value is greater than the second preset threshold, it means that the current communication situation of the DUT is poor, and the transmission power of the base station simulator can be appropriately increased. In addition, as can be seen from the above, the power step size in the embodiment of the present application may remain unchanged, may become the opposite number, or may be multiplied by a preset multiple and then reduced to become the opposite number. Therefore, as the TIS test process proceeds, the absolute value of the power step size will gradually decrease overall, so that in the later stage of the TIS test process, the change in transmission power each time will be smaller. That is, the transmission power changes faster in the early stage of the test, which can make the transmission power quickly adjusted to the target, and changes slower in the later stage of the test, so that the transmission power can be accurately regulated near the target.

[0234] In this case, if the power step is greater than the third preset threshold, it means that the current power step is too large to achieve precise control, so the current power step can be multiplied by a preset multiple. In addition, since the transmit power needs to be increased, the power step needs to be adjusted to the opposite number, so that the power step becomes a negative value, and the adjusted power step is subtracted from the current transmit power to increase the transmit power.

[0235] On the contrary, if the power step is less than the third preset threshold, it means that the current power step is already small, and the transmit power has been precisely regulated. Therefore, the transmit power obtained after precise regulation can be recorded as the transmit power for calculating the TIS test result.

[0236] For example, the third preset threshold may be 0.5 dB, 0.3 dB, etc.

[0237] S1206, calculating the average value of the recorded transmission power.

[0238] In one embodiment of the present application, an average value of all recorded transmission powers may be calculated.

[0239] S1207: Determine the maximum value of the absolute values ​​of the differences between the new average value and the average values ​​obtained from a second preset number of historical records.

[0240] For example, the second preset number may be 5, 10, 15, etc.

[0241] It should be noted that if the historical average value has not reached the second preset number, step S1207 can be omitted and steps S1201-S1206 can be directly returned to obtain a new average value until the number of historical average values ​​reaches the second preset number, thereby ensuring that the results obtained in this scheme are obtained after collecting a sufficient number of average values, eliminating the contingency during the operation of the scheme, and making the final TIS test results more accurate.

[0242] In one embodiment of the present application, the difference between the new average value and the average values ​​obtained from the second preset number of histories can be calculated respectively, and then the absolute value of each difference can be calculated to determine the maximum value among the absolute values.

[0243] The second preset number of historical average values ​​are the second preset number of historical average values ​​whose time is closest to the current time.

[0244] Then, it is determined whether the new maximum value is less than the fourth preset threshold value. If the new maximum value is less than the fourth preset threshold value, it means that the transmit power is relatively stable in the recent period of time and the fluctuation is small. Then, the TIS test result can be calculated based on the stable transmit power, and step S1208 is executed. If the new maximum value is not less than the fourth preset threshold value, after the stirring paddle in the reverberation chamber changes its position, it returns to step S1201.

[0245] In one embodiment of the present application, the stirring paddle in the reverberation chamber may be in a continuously rotating state.

[0246] In another embodiment of the present application, the stirring paddle in the reverberation chamber rotates once each time it is determined that the new maximum value is not less than the fourth preset threshold.

[0247] S1208: Calculate the TIS test result based on the recorded transmission power.

[0248] The TIS test results may be calculated using the relevant technology or the solution provided in the above embodiments, and the embodiments of the present application are not limited to this.

[0249] As can be seen from the above, in the solution provided in the embodiment of the present application, the transmission power and power step of the base station simulator are continuously adjusted, so that the communication anomaly value of the DUT is gradually close to the first preset threshold value under the influence of the transmission power of the base station simulator, and the transmission power required by the base station simulator in order to stabilize the communication anomaly value of the DUT to near the first preset threshold value is finally obtained through testing. Since the absolute value of the power step is originally large and then gradually reduced, the adjustment of the transmission power is faster in the early stage and slower in the later stage, and it can be quickly and accurately adjusted to a state that meets the target requirements. Furthermore, after obtaining the transmission power, the embodiment of the present application will also calculate the average value of the transmission power, and the TIS test result will only be calculated when the transmission power is determined to be relatively stable based on the average value. Thereby, the accuracy of the final TIS test result is higher.

[0250] In yet another embodiment of the present application, a transmission power curve may be generated in real time according to the obtained transmission power.

[0251] See also Fig.13 , which is a power curve diagram of the transmission power provided in an embodiment of the present application.

[0252] The horizontal axis in the figure is the transmission power, and the vertical axis is the packet loss rate. Each star point corresponds to the transmission power obtained once, and the connecting line between the star points is the power curve of the generated transmission power. The packet loss rate of 10% is the above-mentioned second preset threshold.

[0253] See also Fig.14 , is a flow chart of the second TIS test provided in the embodiment of the present application. The communication abnormality value in this embodiment is the packet loss rate.

[0254] First, configure the DUT to work in receive mode.

[0255] Set the initial transmission power of the base station simulator to TP=P0 and the initial power step to SP=S0.

[0256] Set the transmission power of the base station simulator to TP=TP-SP.

[0257] Read the packet loss rate returned by the DUT.

[0258] Determine whether the packet loss rate is greater than the threshold R.

[0259] If it is greater than the threshold R, it is determined whether SP is greater than 0. In this case, if SP is not greater than 0, it returns to set the transmission power of the base station simulator TP=TP-SP. If SP is greater than 0, it continues to determine whether SP is less than the third preset threshold. If it is less than the third preset threshold, the current transmission power is recorded. If it is not less than the third preset threshold, SP=-preset multiple×SP is set. Then the transmission power of the base station simulator TP=TP-SP is set.

[0260] If it is not greater than the threshold R, it is determined whether SP is greater than 0. In this case, if SP is greater than 0, the transmission power TP of the base station simulator is directly set to TP-SP. If SP is not greater than 0, SP is set to -preset multiple × SP. Then the transmission power TP of the base station simulator is set to TP-SP.

[0261] After recording the current transmit power, calculate the average transmit power ( ).

[0262] Calculate the average value ( ) and the first N averages ( to )The maximum absolute value of the difference ( ).

[0263] Determine the maximum value ( ) is less than the threshold and k is greater than N.

[0264] If yes, the TIS test result is calculated. Otherwise, the stirring blade is controlled to rotate, and then the initial transmission power of the base station simulator is set to TP=P0 and the initial power step size is set to SP=S0.

[0265] See also Fig.15 , is a flow chart of an OTA test provided in an embodiment of the present application.

[0266] The process consists of two parts. The first part is to adjust the channel parameters of the reverberation chamber, and the second part is OTA testing.

[0267] In the first part, the delay stretch parameter target that needs to be adjusted is first determined based on the DUT, and then the absorbing materials are configured in an adaptive distributed optimization manner to measure the field average performance and delay stretch parameters of the reverberation chamber.

[0268] Determine whether the delay spread parameter reaches the delay spread parameter target.

[0269] If so, execute the second part, otherwise, continue to adaptively distribute and optimize the configuration of the absorbing material.

[0270] In the second part, we first calibrate the generalized reference power transfer parameter, which is the After that, configure the base station simulator and DUT and establish a communication connection between them. Then, perform TRP test, perform TIS test and control the rotation of the stirring paddle.

[0271] Corresponding to the aforementioned reverberation chamber air interface testing method with flexible and adjustable channel parameters, an embodiment of the present application further provides a reverberation chamber air interface testing device with flexible and adjustable channel parameters.

[0272] See also Fig.16 , is a schematic diagram of the structure of a reverberation chamber air interface test device with flexible and adjustable channel parameters provided in an embodiment of the present application, the device comprising:

[0273] For the inner surface of the reverberation chamber, the configuration position of the absorbing material to be configured in the inner surface is obtained by the following quantity determination module 1601, radius calculation module 1602 and position determination module 1603:

[0274] The quantity determination module 1601 is used to determine the quantity of the absorbing material to be configured on the inner surface;

[0275] A radius calculation module 1602, for calculating a sampling radius based on the size of the inner surface, the size and quantity of the absorbing material;

[0276] A position determination module 1603 is used to determine the configuration position of the absorbing material in the inner surface based on the sampling radius;

[0277] The testing module 1604 is used to perform an air interface test in a reverberation chamber after the absorbing material is set according to the obtained configuration position.

[0278] In the embodiment of the present application, for each inner surface of the reverberation chamber, the sampling radius can be calculated according to the number and size of the absorbing material and the size of the inner surface, and the position of the absorbing material on the inner surface can be allocated based on the sampling radius, so that the absorbing material can be evenly distributed on each inner surface. And because each inner surface is equipped with absorbing material, it is possible to effectively utilize the three-dimensional space in the reverberation chamber, increase the number of absorbing materials that can be laid, achieve better absorbing effect, and then increase the adjustable range of channel parameters such as delay width and path parameters in the reverberation chamber, which can better meet the test requirements of terminals with different requirements for channel parameters.

[0279] Furthermore, evenly laying absorbing materials on all inner surfaces can also reduce the degree to which the uniformity of the electromagnetic field at different locations in the working area of ​​the reverberation chamber is destroyed.

[0280] Furthermore, the configuration of the absorbing material matches the actual size of the reverberation chamber. Therefore, the absorbing material configuration scheme provided by the embodiment of the present application can match the reverberation chamber, thereby adaptively achieving the position allocation of the absorbing material in different reverberation chambers.

[0281] In one embodiment of the present application, the device further includes:

[0282] A measurement result obtaining module, used to obtain the current measurement result after configuring the absorbing material according to the determined configuration position, wherein the measurement result includes: a quality index representing the quality of the multipath transmission channel of the current reverberation chamber and / or a uniformity index representing the uniformity of the electromagnetic field at different positions of the current reverberation chamber;

[0283] A demand judgment module is used to judge whether the electromagnetic environment of the current reverberation room represented by the measurement results meets the preset requirements;

[0284] The quantity adjustment module is used to adjust the quantity of the absorbing material to be configured on the inner surface when the judgment result of the demand judgment module is no, return to trigger the execution of the radius calculation module, until the electromagnetic environment of the current reverberation chamber represented by the measurement result meets the preset requirements, and obtain the final configuration position of the absorbing material.

[0285] In the embodiment of the present application, after completing the position configuration of the absorbing material, the actual situation of the reverberation chamber is tested to determine whether the current reverberation chamber can meet the preset requirements. If the preset requirements cannot be met, the amount of absorbing material is adjusted until the preset requirements are met. Thus, the result of the OTA test using the configured reverberation chamber can meet the test standards.

[0286] In one embodiment of the present application, the absorbing material is fixed to one side of a substrate, and an adsorption component capable of being adsorbed to the inner surface of the reverberation chamber is fixed to the other side of the substrate.

[0287] By adding a substrate and an adsorption component to the absorbing material in the above manner, the absorbing material is easy to install, and when uninstalling, it only needs to be lifted along the edge of the absorbing material to remove it, which is very convenient. It is suitable for application scenarios in which the position of the absorbing material needs to be frequently adjusted in the embodiments of the present application.

[0288] In one embodiment of the present application, a measurement antenna, a reference antenna and a device to be tested DUT are configured in a reverberation chamber after the absorbing material is set according to the obtained configuration position, and the measurement antenna is communicatively connected to the base station simulator. The test module 1604 includes:

[0289] A parameter acquisition submodule, used to obtain the frequency response between the base station simulator port and the reference antenna, the mismatch of the reference antenna, and the radiation efficiency of the reference antenna measured during the rotation of the stirring paddle in the reverberation chamber;

[0290] A transfer parameter calculation submodule, used to calculate a reference power transfer parameter between the base station simulator and the reference antenna based on the frequency response, mismatch and radiation efficiency;

[0291] The air interface test submodule is used to perform air interface testing and calculate the total radiated power TRP test result and / or the total omnidirectional sensitivity TIS test result based on the reference power transfer parameter.

[0292] In one embodiment of the present application, the air interface test submodule is specifically used for:

[0293] Obtaining a plurality of received powers of the base station simulator measured during the rotation of the stirring paddle in the reverberation chamber; calculating a TRP test result based on the plurality of received powers and the reference power transfer parameter;

[0294] and / or

[0295] A plurality of transmission powers of the base station simulator measured during the rotation of the stirring paddle in the reverberation chamber are obtained; and a TIS test result is calculated based on the plurality of transmission powers and the reference power transfer parameter.

[0296] As can be seen from the above, compared with the related art, whether it is a TRP test or a TIS test, the method of testing using the solution provided in the embodiment of the present application is more convenient, which can reduce the number of parameters that need to be measured and reduce the amount of calculation. It can also reduce the uncertainty of the measured parameters and improve the accuracy and reliability of the final OTA test results.

[0297] In one embodiment of the present application, a measurement antenna, a reference antenna and a DUT are configured in a reverberation chamber after the absorbing material is set according to the obtained configuration position, and the measurement antenna is communicatively connected to the base station simulator. The test module 1604 includes:

[0298] A first receiving power obtaining submodule, used to obtain the receiving power of the base station simulator measured during the rotation of the stirring paddle in the reverberation chamber;

[0299] A first average value calculation submodule, for each received power obtained, calculating an average value of the received power and all other previously obtained received powers;

[0300] A first maximum value determination submodule, used to determine the maximum value of the absolute values ​​of the differences between the new average value and a first preset number of average values ​​obtained historically;

[0301] A TRP test submodule, configured to calculate a TRP test result based on the obtained received power if the new maximum value is less than a first preset threshold;

[0302] The second receiving power obtaining submodule is used to obtain a new receiving power if the new maximum value is not less than the first preset threshold value, and return to trigger the execution of the first average value calculating submodule.

[0303] From the above, it can be seen that in the solution provided in the embodiment of the present application, before calculating the TRP test results, a series of average value calculations will be performed first. The TRP test results will be calculated only when the difference between the calculated average values ​​is small, that is, when the received power tends to be stable, thereby ensuring the accuracy of the TRP test results.

[0304] In one embodiment of the present application, the testing module 1604 further includes:

[0305] The abnormality judgment submodule is used to judge whether the newly obtained received power is abnormal;

[0306] The power removal submodule is used to remove the receiving power and wait for the next receiving power to be obtained when the judgment result of the abnormal judgment submodule is yes.

[0307] From the above, it can be seen that in the embodiment of the present application, the average value is calculated after removing the abnormal received power, and then the TRP test result is calculated, so as to speed up the convergence of the average value and improve the accuracy of the TRP test result.

[0308] In one embodiment of the present application, a measurement antenna, a reference antenna and a DUT are configured in the reverberation chamber after the absorbing material is set according to the determined configuration position, and the measurement antenna is communicatively connected to the base station simulator. The test module 1604 is specifically used to:

[0309] Obtaining a communication anomaly value detected by the DUT during the process of the DUT receiving a signal sent by the base station simulator during the rotation of the stirring paddle in the reverberation chamber, wherein the communication anomaly value is a bit error rate or a packet loss rate;

[0310] If the new communication abnormality value is not greater than the first preset threshold value, and the current power step is greater than 0, the transmission power of the base station simulator is controlled to be reduced by the current power step, and a new communication abnormality value is waited to be obtained;

[0311] If the new communication abnormality value is not greater than the first preset threshold value, and the current power step is less than 0, the power step is updated to the inverse of the current power step multiplied by the preset multiple, the transmit power of the base station simulator is controlled to be subtracted from the updated power step, and a new communication abnormality value is waited to be obtained, wherein the preset multiple is greater than 0 and less than 1;

[0312] If the new communication abnormality value is greater than the first preset threshold value and the current power step is less than 0, the transmission power of the base station simulator is controlled to be reduced by the current power step, and a new communication abnormality value is waited to be obtained;

[0313] If the new communication abnormality value is greater than the first preset threshold value, and the current power step is greater than 0, then when the current power step is greater than the third preset threshold value, the power step is updated to the inverse of the current power step multiplied by the preset multiple, the transmission power of the base station simulator is controlled to be subtracted from the updated power step, and a new communication abnormality value is waited for; when the current power step is not greater than the third preset threshold value, the current transmission power of the base station simulator is recorded;

[0314] Calculate the average value of the recorded transmission power;

[0315] Determine the maximum value of the absolute value of the difference between the new average value and the average values ​​obtained from the second preset number of historical records;

[0316] If the new maximum value is less than the fourth preset threshold, calculating the TIS test result based on the recorded transmit power;

[0317] If the new maximum value is not less than the fourth preset threshold, after the stirring paddle in the reverberation chamber changes position, the step of returning to execute the step of obtaining the communication anomaly value detected by the DUT in the process of receiving the signal sent by the base station simulator during the rotation of the stirring paddle in the reverberation chamber.

[0318] As can be seen from the above, in the solution provided in the embodiment of the present application, the transmission power and power step of the base station simulator are continuously adjusted, so that the communication anomaly value of the DUT is gradually close to the first preset threshold value under the influence of the transmission power of the base station simulator, and the transmission power required by the base station simulator in order to stabilize the communication anomaly value of the DUT to near the first preset threshold value is finally obtained through testing. Since the absolute value of the power step is originally large and then gradually reduced, the adjustment of the transmission power is faster in the early stage and slower in the later stage, and it can be quickly and accurately adjusted to a state that meets the target requirements. Furthermore, after obtaining the transmission power, the embodiment of the present application will also calculate the average value of the transmission power, and the TIS test result will only be calculated when the transmission power is determined to be relatively stable based on the average value. Thereby, the accuracy of the final TIS test result is higher.

[0319] The embodiment of the present application also provides an electronic device, Fig.17 , is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application, the electronic device includes: a processor 1701, a transceiver 1704, and a machine-readable storage medium 1702;

[0320] The processor 1701 is a processor for implementing any of the method steps in the aforementioned data compression method.

[0321] like Fig.17 As shown, the electronic device may further include a communication bus 1703. The processor 1701, the machine-readable storage medium 1702, and the transceiver 1704 communicate with each other through the communication bus 1703. The communication bus 1703 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The communication bus 1703 may be divided into an address bus, a data bus, a control bus, and the like.

[0322] The transceiver 1704 may be a wireless communication module. Under the control of the processor 1701 , the transceiver 1704 exchanges data with other devices.

[0323] The machine-readable storage medium 1702 may include a random access memory (RAM) or a non-volatile memory (NVM), such as at least one disk storage. In addition, the machine-readable storage medium 1702 may also be at least one storage device located away from the aforementioned processor.

[0324] Processor 1701 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0325] In another embodiment provided in the present application, a computer-readable storage medium is also provided, in which a computer program is stored. When the computer program is executed by a processor, the steps of the reverberation chamber air interface test method for any of the above-mentioned flexible and adjustable channel parameters are implemented.

[0326] In another embodiment provided by the present application, a computer program product including instructions is also provided, which, when executed on a computer, enables the computer to execute any of the reverberation chamber air interface testing methods with flexible and adjustable channel parameters in the above embodiments.

[0327] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive Solid State Disk (SSD)), etc.

[0328] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0329] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, electronic device, computer-readable storage medium, and computer program product embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0330] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A reverberation chamber air interface test method with flexible and adjustable channel parameters, characterized in that: The method comprises: For the inner surface of the reverberation chamber, the configuration position of the absorbing material to be configured in the inner surface is obtained by: Determining the amount of absorbing material to be configured on the inner surface; Based on the size of the inner surface, the size and quantity of the absorbing materials, a sampling radius is calculated, and for each absorbing material, after configuration, a circular area with the center of the absorbing material as the center and the sampling radius as the radius does not contain the center of other absorbing materials, and the ratio of the area of ​​the union of the circular areas corresponding to all absorbing materials to the area of ​​the inner surface reaches a preset ratio; Based on the sampling radius, determining a configuration position of the absorbing material in the inner surface; After configuring the absorbing material according to the determined configuration position, obtaining the current measurement result, wherein the measurement result includes: a quality index representing the quality of the multipath transmission channel of the current reverberation chamber and / or a uniformity index representing the uniformity of the electromagnetic field at different positions of the current reverberation chamber; Determine whether the current electromagnetic environment of the reverberation room represented by the measurement results meets the preset requirements; If not, the amount of absorbing material to be configured on the inner surface is adjusted, and the step of calculating the sampling radius based on the size of the inner surface, the size and amount of the absorbing material is returned to execute, until the electromagnetic environment of the current reverberation chamber represented by the measurement result meets the preset requirements, and the final configuration position of the absorbing material is obtained; The air-port test is performed in a reverberation chamber after the absorbing material is set according to the obtained configuration position.

2. The reverberation chamber air interface test method with flexible and adjustable channel parameters according to claim 1 is characterized in that: The absorbing material is fixed on one side of the substrate, and an adsorption component capable of being adsorbed on the inner surface of the reverberation chamber is fixed on the other side of the substrate.

3. The reverberation chamber air interface testing method with flexible and adjustable channel parameters according to claim 1 or 2, characterized in that: A measurement antenna, a reference antenna and a device to be tested DUT are configured in a reverberation chamber after absorbing materials are arranged according to the obtained configuration position, the reference antenna is communicatively connected to the DUT, the measurement antenna is communicatively connected to a base station simulator, and an air interface test is performed in the reverberation chamber after absorbing materials are arranged according to the determined configuration position, including: Obtaining the frequency response between the base station simulator port and the reference antenna, the mismatch of the reference antenna, and the radiation efficiency of the reference antenna measured during the rotation of the stirring paddle in the reverberation chamber; Calculating a reference power transfer parameter between the base station simulator and the reference antenna based on the frequency response, the mismatch, and the radiation efficiency; Perform air interface testing and calculate total radiated power TRP test results and / or total omnidirectional sensitivity TIS test results based on the reference power transfer parameters.

4. The reverberation chamber air interface test method with flexible and adjustable channel parameters according to claim 3 is characterized in that: The performing of the air interface test and calculating the total radiated power TRP test result and / or the total omnidirectional sensitivity TIS test result based on the reference power transfer parameter include: Obtaining a plurality of received powers of the base station simulator measured during the rotation of the stirring paddle in the reverberation chamber; calculating a TRP test result based on the plurality of received powers and the reference power transfer parameter; and / or A plurality of transmit powers of the base station simulator measured during the rotation of the stirring paddle in the reverberation chamber are obtained; and a TIS test result is calculated based on the plurality of transmit powers and the reference power transfer parameter.

5. The reverberation chamber air interface testing method with flexible and adjustable channel parameters according to claim 1 or 2, characterized in that: A measurement antenna, a reference antenna and a DUT are arranged in a reverberation chamber after the absorbing material is arranged according to the obtained configuration position, the reference antenna is communicatively connected to the DUT, the measurement antenna is communicatively connected to the base station simulator, and an air interface test is performed in the reverberation chamber after the absorbing material is arranged according to the determined configuration position, including: Obtaining the received power of the base station simulator measured during the rotation of the stirring paddle in the reverberation chamber; Each time a received power is obtained, an average value of the received power and other received powers obtained previously is calculated; Determine the maximum value of the absolute value of the difference between the new average value and the first preset number of average values ​​obtained historically; If the new maximum value is less than the first preset threshold, calculating the TRP test result based on the obtained received power; If the new maximum value is not less than the first preset threshold, a new receiving power is obtained, and the process returns to the step of obtaining each receiving power and calculating the average value of the receiving power and other previously obtained receiving powers.

6. The reverberation chamber air interface testing method with flexible and adjustable channel parameters according to claim 5 is characterized in that: Before calculating the average value of the received power and other received powers obtained previously, the method further includes: Determine whether the newly obtained receiving power is abnormal; If so, remove the received power and wait for the next received power.

7. The reverberation chamber air interface testing method with flexible and adjustable channel parameters according to claim 1 or 2, characterized in that: A measurement antenna, a reference antenna and a DUT are arranged in a reverberation chamber after absorbing materials are arranged according to the determined configuration position, and the measurement antenna is communicatively connected with a base station simulator. The air interface test is performed in the reverberation chamber after absorbing materials are arranged according to the determined configuration position, including: Obtaining a communication anomaly value detected by the DUT during the process of the DUT receiving a signal sent by the base station simulator during the rotation of the stirring paddle in the reverberation chamber, wherein the communication anomaly value is a bit error rate or a packet loss rate; If the new communication abnormality value is not greater than the second preset threshold value, and the current power step is greater than 0, then controlling the transmission power of the base station simulator to subtract the current power step, and waiting to obtain a new communication abnormality value; If the new communication abnormality value is not greater than the second preset threshold value, and the current power step is less than 0, the power step is updated to the inverse of the current power step multiplied by the preset multiple, the transmit power of the base station simulator is controlled to be subtracted from the updated power step, and a new communication abnormality value is waited to be obtained, wherein the preset multiple is greater than 0 and less than 1; If the new communication abnormality value is greater than the second preset threshold value and the current power step is less than 0, the transmission power of the base station simulator is controlled to be reduced by the current power step, and a new communication abnormality value is waited to be obtained; If the new communication abnormality value is greater than the second preset threshold value, and the current power step is greater than 0, then when the current power step is greater than the third preset threshold value, the power step is updated to the inverse of the current power step multiplied by the preset multiple, the transmission power of the base station simulator is controlled to be subtracted from the updated power step, and a new communication abnormality value is waited for; when the current power step is not greater than the third preset threshold value, the current transmission power of the base station simulator is recorded; Calculate the average value of the recorded transmission power; Determine the maximum value of the absolute value of the difference between the new average value and the average values ​​obtained from the second preset number of historical records; If the new maximum value is less than the fourth preset threshold, calculating the TIS test result based on the recorded transmit power; If the new maximum value is not less than the fourth preset threshold, after the stirring paddle in the reverberation chamber changes position, the step of returning to execute the step of obtaining the communication anomaly value detected by the DUT in the process of receiving the signal sent by the base station simulator during the rotation of the stirring paddle in the reverberation chamber.

8. A reverberation chamber air interface test device with flexible and adjustable channel parameters, characterized in that: The device comprises: For the inner surface of the reverberation chamber, the configuration position of the absorbing material to be configured in the inner surface is obtained by the following quantity determination module, radius calculation module and position determination module: A quantity determination module, used to determine the quantity of the absorbing material to be configured on the inner surface; A radius calculation module, used to calculate the sampling radius based on the size of the inner surface, the size and quantity of the absorbing material; a position determination module, configured to determine the configuration position of the absorbing material in the inner surface based on the sampling radius, and for each absorbing material, after configuration, the center of the absorbing material is taken as the center of the circle and the sampling radius is taken as the radius, the center of other absorbing materials does not exist in the circular area, and the ratio of the area of ​​the union of the circular areas corresponding to all absorbing materials to the area of ​​the inner surface reaches a preset ratio; after configuring the absorbing material according to the determined configuration position, obtaining the current measurement result, wherein the measurement result includes: a quality index representing the quality of the multipath transmission channel of the current reverberation chamber and / or a uniformity index representing the uniformity of the electromagnetic field at different positions of the current reverberation chamber; judging whether the electromagnetic environment of the current reverberation chamber represented by the measurement result meets the preset requirements; if not, adjusting the number of absorbing materials to be configured on the inner surface, returning to the step of calculating the sampling radius based on the size of the inner surface, the size and number of absorbing materials, until the electromagnetic environment of the current reverberation chamber represented by the measurement result meets the preset requirements, and obtaining the final configuration position of the absorbing material; The test module is used to perform air interface testing in a reverberation chamber after absorbing materials are set according to the obtained configuration position.

9. An electronic device, characterized in that: The electronic device includes a memory, a transceiver, and a processor: Memory for storing computer programs; a transceiver, for transmitting and receiving data under the control of the processor; A processor, configured to read the computer program in the memory and execute the method steps according to any one of claims 1 to 7.

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