Performance testing system and method

Abstract

The application relates to a performance measurement system and method. The performance measurement system comprises a 5G base station simulator, an intermediate instrument and a terminal anechoic chamber; wherein the terminal anechoic chamber comprises a terminal to be measured and an antenna probe array surrounding the terminal to be measured; the antenna probe array comprises antenna probes on a horizontal probe ring, antenna probes on a vertical probe ring and antenna probes on a reconfigurable pitch probe ring; the vertical probe ring is perpendicular to the horizontal probe ring and has the same diameter; the reconfigurable pitch probe ring is located on a quadrant of a sphere; the sphere is constructed with the terminal to be measured as the spherical center and the diameter of the horizontal probe ring as the diameter of the sphere, and the vertical probe ring and the horizontal probe ring uniformly divide the sphere into multiple quadrants. The method can measure the performance data of the terminal to be measured in the same channel environment as the actual application scene, and improves the accuracy and reliability of the measurement results.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mobile communication, in particular to a performance test system and method. BACKGROUND

[0002] The purpose of the over the air (OTA) test of multiple-input multiple-output (MIMO) is to ensure that the test results in the laboratory can truly reflect the wireless performance of the terminal under test in various complex actual use environments and user use states.

[0003] In the prior art, the performance test method for the terminal under test is mainly based on a terminal anechoic chamber and some antenna probes uniformly distributed around the terminal under test, a channel simulator is used to simulate the propagation channel of the real environment, and a base station simulator is used to simulate the configurable base station signal, so as to provide a repeatable and controllable static test environment. However, the number of antenna probes used in this test method is large, and the positions are fixed, which has the problems of high cost, poor flexibility and limited simulation accuracy. SUMMARY

[0004] Therefore, it is necessary to provide a performance test system and method to solve the above technical problems, which can construct the same channel environment as the actual application environment, so as to directly measure the performance data of the terminal under test in the current channel environment.

[0005] In a first aspect, the present application provides a performance test system, which comprises a 5G base station simulator, an intermediate instrument and a terminal anechoic chamber; wherein the terminal anechoic chamber comprises a terminal under test and an antenna probe array surrounding the terminal under test; the antenna probe array comprises antenna probes on a horizontal probe ring, antenna probes on a vertical probe ring and antenna probes on a reconfigurable pitch probe ring; the vertical probe ring and the horizontal probe ring are perpendicular to each other and have the same diameter; the reconfigurable pitch probe ring is located on a quadrant of a sphere; the sphere is constructed with the terminal under test as the center and the diameter of the horizontal probe ring as the diameter of the sphere, and the vertical probe ring and the horizontal probe ring uniformly divide the sphere into multiple quadrants;

[0006] The 5G base station simulator is configured to transmit a radio frequency signal.

[0007] The intermediate instrument is configured to process the radio frequency signal according to a channel model to obtain a downlink signal, and transmit the downlink signal to the terminal under test through the antenna probe array.

[0008] The terminal under test is configured to transmit an uplink signal to the intermediate instrument through the antenna probe array based on the received downlink signal, and determine performance data of the terminal under test according to the downlink signal and the uplink signal.

[0009] In one embodiment, the intermediate instrument includes: a first variable frequency power amplifier, a second variable frequency power amplifier, and a channel simulator.

[0010] The first variable frequency power amplifier is configured to down-convert the radio frequency signal to obtain a first power amplifier signal, and transmit the first power amplifier signal to the channel simulator.

[0011] The channel simulator is configured to attenuate the first power amplifier signal according to a channel model to obtain a first attenuated signal, and transmit the first attenuated signal to the second variable frequency power amplifier.

[0012] The second variable frequency power amplifier is configured to up-convert the first attenuated signal to obtain a downlink signal.

[0013] In one embodiment, the horizontal probe ring is arranged horizontally, and 12 antenna probes are installed on the horizontal probe ring, and each antenna probe is separated by 30 degrees of azimuth angle.

[0014] In one embodiment, the vertical probe ring includes a first vertical probe ring and a second vertical probe ring; wherein the first vertical probe ring and the second vertical probe ring are orthogonal and both perpendicular to the horizontal probe ring.

[0015] In one embodiment, 11 antenna probes are installed on the first vertical probe ring, and each antenna probe is separated by 30 degrees of elevation angle.

[0016] 10 antenna probes are installed on the second vertical probe ring, and each antenna probe is separated by 30 degrees of elevation angle.

[0017] In one embodiment, the first vertical probe ring, the second vertical probe ring and the horizontal probe ring uniformly divide the sphere into 8 quadrants; each quadrant is distributed with a reconfigurable elevation probe ring; each reconfigurable elevation probe ring is installed with 2 antenna probes and 1 rotating motor.

[0018] In one embodiment, each reconfigurable elevation probe ring is installed with 1 sliding rail, and the antenna probe on the sliding rail is slidable.

[0019] In one embodiment, the terminal darkroom is further configured to adjust the antenna probe array according to the channel model parameters sent by the upper computer.

[0020] In one embodiment, if the 5G base station simulator is a real base station, the 5G base station simulator is connected with the intermediate instrument through an air interface.

[0021] In a second aspect, the present application further provides a performance testing method applied to a terminal darkroom in a performance testing system, and the method includes:

[0022] acquire a downlink signal sent by the intermediate instrument; wherein the downlink signal is obtained by processing a radio frequency signal sent by the 5G base station simulator in the performance test system;

[0023] send an uplink signal to the intermediate instrument according to the downlink signal;

[0024] determine the performance data according to the downlink signal and the uplink signal.

[0025] The performance test system and method described above can achieve high-precision construction of the same communication environment as the actual application environment by setting the horizontal probe ring, the vertical probe ring and the reconfigurable tilt probe ring in the terminal darkroom, and further surround the terminal under test with the antenna probe array; further, the 5G base station simulator transmits a radio frequency signal, the intermediate instrument processes the radio frequency signal according to the channel model, and sends the obtained downlink signal to the terminal under test through the antenna probe array; the terminal under test sends an uplink signal to the intermediate instrument through the antenna probe array according to the downlink signal, and establishes a complete end-to-end test link, which can determine the performance data of the terminal under test in the same communication environment as the actual application scenario, and improve the accuracy and reliability of the performance test result of the terminal under test. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural diagram of the performance test system in one embodiment;

[0027] Figure 2 is a structural diagram of the terminal darkroom in one embodiment;

[0028] Figure 3 is a structural diagram of the antenna probe array in the terminal darkroom in one embodiment;

[0029] Figure 4 is a structural diagram of the antenna probe array in the terminal darkroom in another embodiment;

[0030] Figure 5 is a structural diagram of the intermediate instrument in one embodiment;

[0031] Figure 6 is a structural diagram of the 5G base station simulator in one embodiment;

[0032] Figure 7 is a flowchart of the performance test method in one embodiment. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0034] At present, as the first communication standard, the 5th-Generation (5G) standard has been basically frozen. From the device form, the 5G New Radio (NR) is a new base station combined with high power (200W), large bandwidth (100MHz) and large-scale antenna technology, and the 5G NR has multiple subcarriers and can perform beamforming.

[0035] In the 5G era, with the use of millimeter wave frequency bands and MIMO technology, the antenna system of the 5G transceiver device is more integrated and complex, and the conventional conduction test method is no longer suitable for the performance test of the 5G antenna system. At the same time, the channel model of the 5G era has also changed from two-dimensional to three-dimensional, and the traditional two-dimensional multi-probe anechoic chamber needs to increase probes in the vertical direction to simulate the information of the elevation angle domain of the three-dimensional channel model. Therefore, the two-dimensional multi-probe anechoic chamber evolves into a three-dimensional probe arrangement to support the performance test of the measured terminal.

[0036] In the prior art, the performance test method of the measured terminal is mainly based on a terminal anechoic chamber and some uniformly distributed antenna probes around the measured terminal, using a channel simulator to simulate the propagation channel of the real environment and a base station simulator to simulate the configurable base station signal, to provide a repeatable and controllable static test environment. However, this test method uses a large number of fixed-position antenna probes, which has the problems of high cost, poor flexibility and limited simulation accuracy.

[0037] In order to more accurately determine the performance data of the measured terminal, in one embodiment, as shown in Figure 1 , a performance measurement system is provided, comprising a 5G base station simulator, an intermediate instrument and a terminal anechoic chamber.

[0038] Among them, the terminal anechoic chamber is an anechoic chamber for simulating the environment of the measured terminal; as shown in Figure 2 , the terminal anechoic chamber includes a measured terminal and an antenna probe array surrounding the measured terminal; the antenna probe array includes antenna probes on a horizontal probe ring, antenna probes on a vertical probe ring and antenna probes on a reconfigurable elevation probe ring; the vertical probe ring and the horizontal probe ring are perpendicular to each other and have the same diameter; the reconfigurable elevation probe ring is located on a quadrant of a sphere; the sphere is constructed with the measured terminal as the center and the diameter of the horizontal probe ring as the diameter of the sphere, and the vertical probe ring and the horizontal probe ring uniformly divide the sphere into multiple quadrants. The performance data of the measured terminal is the data used to measure the performance of the measured terminal, which can include the downlink throughput and reception sensitivity of the measured terminal.

[0039] Optionally, the terminal to be tested can be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, Internet of Things devices, and portable wearable devices. The Internet of Things device can be a smart speaker, a smart television, a smart air conditioner, a smart vehicle device, etc. The portable wearable device can be a smart watch, a smart bracelet, a head-mounted device, etc.

[0040] In the embodiment, the channel model parameters are related parameters of the channel model to be simulated, such as signal transmission delay and signal propagation angle. The channel model is a channel model identical to the actual channel environment, including a deterministic channel model and a channel model based on statistical characteristics. The deterministic channel model can be obtained by directly measuring the channel model parameters. The measured channel model parameters are transmitted by the host computer to the 5G base station simulator, the intermediate instrument, and the terminal darkroom, and accurate modeling is performed by the 5G base station simulator, the intermediate instrument, and the terminal darkroom. The channel model based on statistical characteristics can determine the channel model parameters by using the statistical average method based on the geometric distribution and the space-time correlation characteristics. The determined channel model parameters are transmitted by the host computer to the 5G base station simulator, the intermediate instrument, and the terminal darkroom, and modeling is performed by the 5G base station simulator, the intermediate instrument, and the terminal darkroom (or the relatively mature urban microcell scene or urban macrocell scene is directly referenced or researched, and parameterized modeling is directly performed by the 5G base station simulator, the intermediate instrument, and the terminal darkroom).

[0041] The 5G base station simulator is a simulator for simulating a 5G base station, which can be a 5G comprehensive measuring instrument or a real 5G base station. The intermediate instrument is an instrument connecting the 5G base station simulator and the terminal darkroom, which is used for processing the signals transmitted or received by the 5G base station simulator and the terminal darkroom.

[0042] Specifically, the 5G base station simulator is used for transmitting a radio frequency signal. After receiving the radio frequency signal transmitted by the 5G base station simulator, the intermediate instrument constructs a channel model according to the channel model parameters sent by the host computer, and then processes the radio frequency signal based on the constructed channel model to obtain a downlink signal. The downlink signal is transmitted to the terminal to be tested through the antenna probe array in the terminal darkroom. Further, the terminal to be tested transmits an uplink signal to the intermediate instrument through the antenna probe array based on the received downlink signal, and determines the performance data of the terminal to be tested according to the received downlink signal and the transmitted uplink signal.

[0043] The performance test system and method can realize high-precision construction of the same communication environment as the actual application environment by arranging the horizontal probe ring, the vertical probe ring and the reconfigurable pitch probe ring in the terminal darkroom, and surrounding the measured terminal with the antenna probe array. Further, the 5G base station simulator transmits a radio frequency signal, the intermediate instrument processes the radio frequency signal according to a channel model, and the obtained downlink signal is transmitted to the measured terminal through the antenna probe array. The measured terminal transmits uplink signals to the intermediate instrument through the antenna probe array according to the downlink signal, a complete end-to-end test link is established, the performance data of the measured terminal can be determined in the same communication environment as the actual application scenario, and the accuracy and reliability of the performance test result of the measured terminal are improved.

[0044] In one embodiment, as shown in Figure 3 The terminal darkroom further includes a horizontal probe ring and a vertical probe ring. The horizontal probe ring is arranged horizontally, and 12 antenna probes are installed on the horizontal probe ring, with each probe being separated by an azimuth angle of 30 degrees.

[0045] Optionally, the vertical probe ring includes a first vertical probe ring and a second vertical probe ring. The first vertical probe ring and the second vertical probe ring are orthogonal and both perpendicular to the horizontal probe ring. The first vertical probe ring is installed with 11 antenna probes, and each antenna probe is separated by an elevation angle of 30 degrees. The second vertical probe ring is installed with 10 antenna probes, and each antenna probe is separated by an elevation angle of 30 degrees.

[0046] Specifically, as shown in Figure 3 It can be seen that one antenna probe is installed at the intersection of the first vertical probe ring and the second vertical probe ring. Two antenna probes are installed at the intersection of the first vertical probe ring and the horizontal probe ring. Two antenna probes are also installed at the intersection of the second vertical probe ring and the horizontal probe ring. Except for the positions of the five antenna probes at the intersections of the first vertical probe ring, the second vertical probe ring and the horizontal probe ring, the antenna probes at other positions can slide along the probe ring.

[0047] It can be understood that by arranging the horizontal probe ring, the first vertical probe ring and the second vertical probe ring in the terminal darkroom and installing antenna probes on the horizontal probe ring, the first vertical probe ring and the second vertical probe ring, a spherical antenna probe array can be arranged around the measured terminal, and three-dimensional signal transmission with the measured terminal can be realized, ensuring accurate signal transmission with the measured terminal and improving the accuracy of measuring the performance data of the measured terminal.

[0048] In one embodiment, as shown in Figure 4As shown, the terminal darkroom further comprises a reconfigurable pitch probe ring. The first vertical probe ring, the second vertical probe ring and the horizontal probe ring divide the sphere into 8 quadrants; each quadrant is provided with a reconfigurable pitch probe ring; and each reconfigurable pitch probe ring is provided with 2 antenna probes and a rotating motor.

[0049] Specifically, referring to Figure 4 It can be seen that the first vertical probe ring, the second vertical probe ring and the horizontal probe ring form a sphere with the terminal under test as the center and the diameter of the horizontal probe ring as the diameter of the sphere. Further, the first vertical probe ring, the second vertical probe ring and the horizontal probe ring divide the sphere into 8 quadrants, and each quadrant is provided with a reconfigurable pitch probe ring at the middle position of the quadrant, and each reconfigurable pitch probe ring is perpendicular to the horizontal direction.

[0050] Further, each reconfigurable pitch probe ring is provided with a slide rail, and the antenna probe on the slide rail is slidable.

[0051] Specifically, each reconfigurable pitch probe ring is provided with a slide rail. In the case where the positions of the two antenna probes on the reconfigurable pitch probe ring need to be adjusted, the rotating motor on the reconfigurable pitch probe ring can be used to drive the slide rail to rotate at an angle, and the two antenna probes on the reconfigurable pitch probe ring can slide along the slide rail, thereby adjusting the angle and position of the antenna probes.

[0052] It can be understood that by arranging the reconfigurable pitch probe ring around the terminal under test, and arranging the two slidable antenna probes, the rotating motor and the slide rail on the reconfigurable pitch probe ring, the antenna probes can be accurately adjusted to the required position and angle when the positions of the antenna probes around the terminal under test need to be adjusted, thereby constructing a communication environment identical to the actual application environment with higher accuracy, to ensure that the performance data of the terminal under test is measured more accurately.

[0053] In order to accurately construct a communication environment identical to the actual application environment, in an embodiment, the terminal darkroom is further configured to adjust the antenna probe array according to the channel model parameters sent by the host computer.

[0054] Specifically, the terminal darkroom can interact with the host computer through a network to obtain the channel model parameters sent by the host computer; further, according to the obtained channel model parameters, the movable antenna probes on the horizontal probe ring, the vertical probe ring and the reconfigurable pitch probe ring included in the terminal darkroom are moved to adjust the antenna probe array in the terminal darkroom, thereby constructing a communication environment identical to the actual application environment.

[0055] It can be understood that the terminal darkroom can more accurately construct the same communication environment as the actual application environment according to the channel model parameters sent by the upper computer by adjusting the positions of the movable antenna probes on the horizontal probe ring, the vertical probe ring and the reconfigurable pitch probe ring included in the mobile terminal darkroom, and then obtaining more accurate performance data of the measured terminal.

[0056] In order to make the intermediate instrument more accurate in processing the signals transmitted in the link, on the basis of the above embodiment, in an embodiment, as shown in the figure, the intermediate instrument includes a first variable frequency power amplifier, a second variable frequency power amplifier and a channel simulator. Figure 5

[0057] The variable frequency power amplifier is an important component in the millimeter wave end-to-end performance test system. In addition to converting signals between high and low frequencies, it also needs to balance the link budget of the entire link. For example, the first variable frequency power amplifier on the 5G base station simulator side needs to have a large power input range, which can be compatible with different types of 5G base station simulators, preventing the power of the 5G base station simulator from being too high, causing the input power of the first variable frequency power amplifier to saturate, or the power of the 5G base station simulator being too low, resulting in low link signal-to-noise ratio and poor communication quality. The second variable frequency power amplifier on the terminal darkroom side has low noise and high power amplification capability, which can ensure that the low-power signal output by the channel simulator still has a good signal-to-noise ratio at the center of the test area.

[0058] In this embodiment, the channel simulator is used to simulate the channel model according to the channel model parameters sent by the upper computer. The principle is mainly to use software defined radio (SDR), open field programmable gate array (FPGA) and software library to design and implement the architecture and workflow of a high-bandwidth real-time channel simulator.

[0059] Further, the channel simulator in this embodiment adopts an uplink and downlink separation design, mainly due to the following reasons: on the one hand, the first variable frequency power amplifier and the second variable frequency power amplifier are both one-way amplifiers and do not support two-way amplification; on the other hand, the channel simulator has a smaller insertion loss in a one-way model state than in a two-way model state, which can reduce the demand for the power amplifier in the rear stage; on the other hand, the channel simulator adopts an uplink and downlink separation design, which can reduce the use of loopers, reducing the complexity of the test system while avoiding the loop self-excitation behavior caused by the insufficient isolation of the loopers.

[0060] ​Specifically, the first frequency conversion power amplifier in the intermediate instrument can receive the radio frequency signal transmitted by the 5G base station simulator, and can perform down-conversion processing on the radio frequency signal to convert the high-frequency radio frequency signal into a low-frequency signal to obtain a first power amplifier signal, and then transmit the first power amplifier signal to the channel simulator.

[0061] Further, the channel simulator can interact with the upper computer through the network to obtain the channel model parameters sent by the upper computer, construct a channel model to be simulated according to the channel model parameters sent by the upper computer, and after receiving the first power amplifier signal transmitted by the first frequency conversion power amplifier, perform attenuation processing on the first power amplifier signal according to the constructed channel model, add corresponding multipath fading characteristics to the first power amplifier signal to obtain a first attenuated signal, and transmit the first attenuated signal to the second frequency conversion power amplifier.

[0062] The second frequency conversion power amplifier can perform up-conversion processing on the first attenuated signal to convert the low-frequency first attenuated signal into a high-frequency signal to obtain a downlink signal, and send the downlink signal to the terminal darkroom through the antenna probe array in the terminal darkroom, and further, the measured terminal sends an uplink signal to the antenna probe array according to the downlink signal, and the measured terminal determines the performance data of the measured terminal according to the received downlink signal and the sent uplink signal.

[0063] It can be understood that by configuring the frequency conversion power amplifier and the channel simulator in the intermediate instrument, the signal transmitted in the link can be more accurately processed under the premise of ensuring that the signal-to-noise ratio of the link is high and the communication quality is good, thereby ensuring accurate measurement of the performance data of the measured terminal and improving the accuracy of the measurement results.

[0064] Further, the intermediate instrument further includes a radio frequency switch matrix, which is used to select a target antenna probe from the antenna probe array, send the downlink signal to the measured terminal through the target antenna probe, and receive the uplink signal sent by the measured terminal.

[0065] In the embodiment, the radio frequency switch matrix is connected with the antenna probe array in the terminal darkroom. The radio frequency switch matrix includes a plurality of radio frequency switches, and one radio frequency switch is connected with one antenna probe in the antenna probe array. For each radio frequency switch, when the radio frequency switch is in an open state, signal transmission can be performed through the antenna probe corresponding to the radio frequency switch; when the radio frequency switch is in a closed state, signal transmission cannot be performed through the antenna probe corresponding to the radio frequency switch. By switching the states of the radio frequency switches in the radio frequency switch matrix, a channel environment identical to the actual application environment can be constructed. The target antenna probe is the selected antenna probe used for signal transmission with the measured terminal.

[0066] Specifically, the radio frequency switch matrix can interact with the upper computer through a network, switch the state of each radio frequency switch in the radio frequency switch matrix according to the channel model parameters transmitted by the upper computer, select a target antenna probe from the antenna probe array, send a downlink signal to the measured terminal through the target antenna probe, and receive an uplink signal sent by the measured terminal.

[0067] It can be understood that by adding a radio frequency switch matrix in the intermediate instrument, switching the state of each radio frequency switch in the radio frequency switch matrix according to the channel model parameters to be simulated, and transmitting signals with the measured terminal through the target antenna probe, a channel environment identical to the actual application environment can be more accurately constructed, thereby ensuring the accuracy and reliability of the measured uplink throughput of the 5G base station.

[0068] Optionally, if the currently simulated channel model is a time-varying channel model, the radio frequency switch matrix can also be used to switch different antenna probes that are transmitting signals to achieve complete signal transmission. For example, if the uplink signal transmitted by the antenna probe in the A direction gradually weakens and disappears over time, and the uplink signal transmitted by the antenna probe in the B direction appears and gradually strengthens, the radio frequency switch matrix can be used to switch the antenna probe in the A direction to the B direction, thereby achieving complete reception of the uplink signal.

[0069] In one embodiment, if the 5G base station simulator is a 5G comprehensive tester, it can be connected to the intermediate instrument through a wire connection; if the 5G base station simulator is a real base station, it does not need to use a wire and can be connected to the intermediate instrument through an air interface.

[0070] Optionally, the 5G base station simulator and the terminal anechoic chamber can be connected to the intermediate instrument through an air interface, thereby constructing a complete end-to-end link. Compared with the prior art which only measures a single device, the test object in the present scheme is expanded from a single device to a complete link system, which can make the measurement result more accurate and the performance data of the measured terminal closer to the communication quality in the actual application environment.

[0071] Further, as shown in Figure 6 If the 5G base station simulator is a real base station, the 5G base station simulator further includes a 5G base station and a probe wall equipped with dual-polarized probes.

[0072] Specifically, the 5G base station in the 5G base station simulator can be used to transmit radio frequency signals; the probe wall equipped with dual-polarized probes can receive the radio frequency signals transmitted by the 5G base station through the dual-polarized probes and send the received radio frequency signals to the intermediate instrument. Since the 5G base station has strong signal transmission power and high sensitivity to signal reception, the dual-polarized probes on the probe wall can use medium-gain probes.

[0073] Optionally, the probe wall in the 5G base station simulator can also adjust the positions of the dual-polarized probes according to the channel model parameters sent by the host computer.

[0074] Specifically, the 5G base station simulator can interact with the host computer through the network to obtain the channel model parameters sent by the host computer; further, the probe wall in the 5G base station simulator can switch the positions of the dual-polarized probes used to receive the radio frequency signals according to the obtained channel model parameters, thereby constructing a channel environment more similar to the actual application environment.

[0075] For example, if the position of the dual-polarized probe used to receive the radio frequency signals is determined to be the upper right corner of the probe wall according to the channel model parameters, the probe wall can switch the position of the dual-polarized probe used to receive the radio frequency signals to the upper right corner, and the dual-polarized probe at the upper right corner of the probe wall can receive the radio frequency signals to simulate the channel model with high precision.

[0076] It can be understood that by switching the positions of the dual-polarized probes used to receive the radio frequency signals according to the channel model parameters, the channel environment identical to the actual application environment can be constructed more accurately, thereby measuring the performance data of the terminal under test in the same channel environment as the actual application scenario, and improving the accuracy and reliability of the measurement results.

[0077] Based on the same inventive concept, as Figure 7 shown, the embodiment of the present application also provides a performance testing method applied to a terminal darkroom in a performance testing system, which can specifically include the following steps:

[0078] S701, obtaining a downlink signal sent by an intermediate instrument.

[0079] The downlink signal is obtained by processing the radio frequency signals sent by the 5G base station simulator in the performance testing system.

[0080] In this embodiment, the intermediate instrument is an instrument for processing the radio frequency signals transmitted by the 5G base station simulator, which can include a frequency conversion power amplifier, a channel simulator, etc. The downlink signal is a signal sent by the base station to the terminal under test. The terminal under test is the terminal device to be measured.

[0081] Specifically, the 5G base station simulator can transmit a radio frequency signal to the intermediate instrument in the performance test system, and the intermediate instrument can receive the transmitted radio frequency signal. After receiving the radio frequency signal transmitted by the 5G base station simulator, the intermediate instrument can process the radio frequency signal to obtain a downlink signal, and then send the downlink signal to the terminal under test through the antenna probe array; further, the terminal under test can obtain the downlink signal sent by the intermediate instrument.

[0082] S702, according to the downlink signal, the intermediate instrument sends an uplink signal.

[0083] The uplink signal is the signal sent by the terminal under test to the base station, which is the signal emitted by the terminal under test to the intermediate instrument based on the downlink signal sent by the intermediate instrument.

[0084] Specifically, after receiving the downlink signal sent by the intermediate instrument through the annular antenna array, the terminal under test can send an uplink signal to the intermediate instrument based on the downlink signal through the antenna probe array.

[0085] S703, according to the downlink signal and the uplink signal, determine the performance data.

[0086] In this embodiment, the performance data of the terminal under test is the data used to measure the performance of the terminal under test, which can include the downlink throughput, reception sensitivity, etc. of the terminal under test.

[0087] Specifically, after the terminal under test sends the uplink signal to the intermediate instrument, the performance data of the terminal under test can be determined according to the received downlink signal and the uplink signal sent to the intermediate instrument.

[0088] The above performance test method can realize high-precision construction of the same communication environment as the actual application environment by setting a horizontal probe ring, a vertical probe ring and a reconfigurable tilt probe ring in the terminal darkroom, and further making the antenna probe array surround the terminal under test; further, the 5G base station simulator transmits a radio frequency signal, the intermediate instrument processes the radio frequency signal according to the channel model, and sends the obtained downlink signal to the terminal under test through the antenna probe array; the terminal under test sends an uplink signal to the intermediate instrument through the antenna probe array according to the downlink signal, and establishes a complete end-to-end test link, which can determine the performance data of the terminal under test in the same communication environment as the actual application scenario, and improve the accuracy and reliability of the performance test result of the terminal under test.

[0089] The technical features of the above embodiments can be combined arbitrarily, and to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered as the scope of the present application.

[0090] The above-described embodiments are merely illustrative of several embodiments of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A performance test system, characterized by The system comprises a 5G base station simulator, an intermediate instrument and a terminal anechoic chamber; wherein the terminal anechoic chamber comprises a terminal under test and an antenna probe array surrounding the terminal under test; the antenna probe array comprises antenna probes on a horizontal probe ring, antenna probes on a vertical probe ring and antenna probes on a reconfigurable pitch probe ring; the vertical probe ring is perpendicular to the horizontal probe ring and has the same diameter; the reconfigurable pitch probe ring is located on a quadrant of a sphere; the sphere is constructed with the terminal under test as the center and the diameter of the horizontal probe ring as the diameter of the sphere, and the vertical probe ring and the horizontal probe ring uniformly divide the sphere into multiple quadrants; the vertical probe ring comprises a first vertical probe ring and a second vertical probe ring; the first vertical probe ring and the second vertical probe ring are orthogonal and both perpendicular to the horizontal probe ring; the first vertical probe ring, the second vertical probe ring and the horizontal probe ring uniformly divide the sphere into eight quadrants; one reconfigurable pitch probe ring is distributed on each quadrant; two antenna probes and one rotating motor are installed on each reconfigurable pitch probe ring; The 5G base station simulator is configured to transmit a radio frequency signal. The intermediate instrument is configured to process the radio frequency signal according to a channel model to obtain a downlink signal and transmit the downlink signal to the terminal under test through the antenna probe array. The terminal under test is configured to transmit an uplink signal to the intermediate instrument through the antenna probe array based on the received downlink signal, and determine performance data of the terminal under test according to the downlink signal and the uplink signal.

2. The system of claim 1, wherein, The intermediate instrument comprises a first variable frequency power amplifier, a second variable frequency power amplifier and a channel simulator. The first variable frequency power amplifier is configured to down-convert the radio frequency signal to obtain a first power amplifier signal and transmit the first power amplifier signal to the channel simulator. The channel simulator is configured to attenuate the first power amplifier signal according to a channel model to obtain a first attenuated signal and transmit the first attenuated signal to the second variable frequency power amplifier. The second variable frequency power amplifier is configured to up-convert the first attenuated signal to obtain a downlink signal.

3. The system of claim 1, wherein, The horizontal probe ring is placed horizontally, and 12 antenna probes are installed on the horizontal probe ring, with each antenna probe separated by a 30-degree azimuth angle.

4. The system of claim 1, wherein, Eleven antenna probes are installed on the first vertical probe ring, with each antenna probe separated by a 30-degree pitch angle. Ten antenna probes are installed on the second vertical probe ring, with each antenna probe separated by a 30-degree pitch angle.

5. The system of claim 1, wherein, Each reconfigurable pitch probe ring is provided with a slide rail, and the antenna probe on the slide rail is slidable.

6. The system of claim 1, wherein, The terminal anechoic chamber is further configured to adjust the antenna probe array according to channel model parameters sent by an upper computer.

7. The system of claim 1, wherein, If the 5G base station simulator is a real base station, the 5G base station simulator is connected to the intermediate instrument through an air interface.

8. The system of claim 7, wherein, If the 5G base station simulator is a real base station, the 5G base station simulator comprises a 5G base station and a probe wall equipped with double-machine probes.

9. The system of claim 1, wherein, The intermediate instrument comprises a radio frequency switch matrix for selecting a target antenna probe from the antenna probe array; and transmitting the downlink signal to the terminal under test through the target antenna probe and receiving the uplink signal transmitted by the terminal under test.

10. A performance test method characterized by, The terminal darkroom is applied to a performance test system, wherein the terminal darkroom comprises a terminal under test and an antenna probe array surrounding the terminal under test; the antenna probe array comprises antenna probes on a horizontal probe ring, antenna probes on a vertical probe ring and antenna probes on a reconfigurable pitch probe ring; the vertical probe ring is perpendicular to the horizontal probe ring and has the same diameter; the reconfigurable pitch probe ring is located on a quadrant of a sphere; the sphere is constructed with the terminal under test as the center and the diameter of the horizontal probe ring as the diameter of the sphere, and the vertical probe ring and the horizontal probe ring uniformly divide the sphere into multiple quadrants; the vertical probe ring comprises a first vertical probe ring and a second vertical probe ring; the first vertical probe ring and the second vertical probe ring are orthogonal and both are perpendicular to the horizontal probe ring; the first vertical probe ring, the second vertical probe ring and the horizontal probe ring uniformly divide the sphere into eight quadrants; one reconfigurable pitch probe ring is distributed on each quadrant; two antenna probes and one rotating motor are installed on each reconfigurable pitch probe ring; The method comprises: acquiring a downlink signal transmitted by an intermediate instrument; wherein the downlink signal is obtained by processing a radio frequency signal transmitted by a 5G base station simulator in the performance test system by the intermediate instrument; transmitting an uplink signal to the intermediate instrument according to the downlink signal; determining performance data according to the downlink signal and the uplink signal.

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