Interference performance test system

Abstract

The application relates to an interference performance test system, which comprises an upper computer, a first simulation device, a second simulation device and multiple directional antennas; the first simulation device establishes a measured communication link with a tested device through the directional antenna connected with the first simulation device; the second simulation device establishes an interference communication link with the tested device through the directional antenna connected with the second simulation device, and the second simulation device is also used for establishing a communication link with other simulation devices to simulate the communication between interference devices; the upper computer is connected with the first simulation device, the second simulation device and the tested device, is used for configuring the communication simulation parameters of the first simulation device and the second simulation device, is used for acquiring measured communication data of the measured communication link and interference communication data of the interference communication link, and is used for determining the interference performance test result of the tested device according to the measured communication data and the interference communication data. The system is close to the real situation of actual business application.

Description

Technical Field

[0001] This application relates to the field of wireless communication testing technology, and in particular to an interference performance testing system. Background Technology

[0002] To achieve comprehensive network coverage and improve network capacity, numerous wireless access points (APs) are deployed in densely populated areas such as shopping malls, hotels, train stations, and campuses. However, wireless spectrum resources are limited, and the dense deployment of WiFi networks inevitably leads to channel contention among a large number of APs. When the coverage areas of APs overlap, interference between adjacent APs will significantly degrade the performance of edge users and even the entire network. Therefore, effectively testing and evaluating the external interference and anti-interference capabilities of smart connected devices (including terminals and APs) is crucial for improving user experience and optimizing network structure.

[0003] In existing technologies, simulation calculations are used to evaluate the external interference and anti-interference capabilities of intelligent connected devices. Specifically, a system model is established based on dense network application scenarios, and scenario simulations are performed, primarily evaluating algorithm strategies and logic. Through power control, channel allocation, timing processing, and spatial optimization, the signal-to-interference plus noise ratio (SINR) of each node in the system is calculated to assess the interference situation in that scenario.

[0004] However, simulation calculations only assess interference phenomena theoretically, and do not adequately consider aspects such as radio frequency links, air interface scenarios, and antennas. Furthermore, they typically only consider the interference situation of the terminal and not the interference situation of the access point, making it difficult to demonstrate consistency with the actual situation. Summary of the Invention

[0005] Therefore, it is necessary to provide an interference performance testing system that can comprehensively address the above-mentioned technical issues and whose testing environment closely reflects the real-world business application situation.

[0006] An interference performance testing system includes a host computer, a first simulation device, a second simulation device, and multiple directional antennas. Both the first and second simulation devices are connected to the directional antennas. The first simulation device simulates a target device communicating with the device under test (DUT) and establishes a test communication link with the DUT through the directional antenna connected to the first simulation device. The second simulation device simulates an interfering device that causes communication interference to the DUT and establishes an interfering communication link with the DUT through the directional antenna connected to the second simulation device. The second simulation device also establishes communication links with other simulation devices to simulate communication between interfering devices. The host computer is connected to the first simulation device, the second simulation device, and the DUT. It configures the communication simulation parameters of the first and second simulation devices, acquires the test communication data of the test communication link and the interference communication data of the interfering communication link, and determines the interference performance test result of the DUT based on the test communication data and the interfering communication data.

[0007] In one embodiment, the second simulation device is specifically used to establish a communication link with other second simulation devices; or, the first simulation device is further used to simulate an interfering device that causes communication interference to the device under test, and the second simulation device is specifically used to establish a communication link with other second simulation devices, or to establish a communication link with the first simulation device.

[0008] In one embodiment, the system further includes a first multipath simulator and a second multipath simulator; the first multipath simulator is disposed between a first simulation device and a directional antenna connected to the first simulation device, for simulating a channel between the device under test and a target device; the second multipath simulator is disposed between a second simulation device and a directional antenna connected to the second simulation device, for simulating a channel between the device under test and an interfering device.

[0009] In one embodiment, the host computer is also connected to both the first multipath simulator and the second multipath simulator; the host computer is also used to configure the channel simulation parameters of the first multipath simulator and the second multipath simulator.

[0010] In one embodiment, the system further includes a power divider, the input of which is connected to a second analog device, the first output of which is connected to a second multipath simulator, and the second output of which is connected to other analog devices that establish a communication link with the second analog device.

[0011] In one embodiment, the host computer is specifically used to control the transmission of data on the communication link under test and to control the disconnection of the interfering communication link, so as to detect the first communication data corresponding to the communication link under test when the communication link under test transmits data alone; the host computer is also used to control the transmission of data on the interfering communication link and to control the disconnection of the communication link under test, so as to detect the second communication data corresponding to the interfering communication link when the interfering communication link transmits data alone; the host computer is also used to control the transmission of data on the communication link under test and the interfering communication link simultaneously, so as to detect the third communication data corresponding to the communication link under test and the fourth communication data corresponding to the interfering communication link when the communication link under test and the interfering communication link transmit data simultaneously.

[0012] In one embodiment, the communication data includes throughput data; the host computer is further configured to calculate the throughput reduction rate of the tested communication link based on the throughput data in the first communication data and the throughput data in the third communication data, and to calculate the throughput reduction rate of the interfering communication link based on the throughput data in the second communication data and the throughput data in the fourth communication data; the host computer is further configured to determine the interference performance test result based on the throughput reduction rate of the tested communication link and the throughput reduction rate of the interfering communication link.

[0013] In one embodiment, the communication data further includes communication latency; the host computer is also configured to calculate the latency difference data of the communication link under test based on the communication latency in the first communication data and the communication latency in the third communication data, and to calculate the latency difference data of the interfering communication link based on the communication latency in the second communication data and the communication latency in the fourth communication data; specifically, the host computer is configured to determine the interference performance test result based on the throughput reduction rate of the communication link under test, the throughput reduction rate of the interfering communication link, the latency difference data of the communication link under test, and the latency difference data of the interfering communication link.

[0014] In one embodiment, the host computer is specifically used to determine the anti-interference capability test result of the device under test based on the throughput reduction rate and latency difference data of the communication link under test; the host computer is specifically used to determine the external interference capability test result of the device under test based on the throughput reduction rate and latency difference data of the interfering communication link.

[0015] In one embodiment, the system further includes a rotary table for placing the device under test; the rotary table is 360° rotatable, specifically used to control the relative orientation between the device under test and multiple directional antennas.

[0016] In one embodiment, the system also includes an anechoic chamber for housing multiple directional antennas, a rotary table, and the device under test.

[0017] In one embodiment, the anechoic chamber is constructed of metal and lined with microwave-absorbing material.

[0018] The aforementioned interference performance testing system includes a host computer, a first simulation device, a second simulation device, and multiple directional antennas. Both the first and second simulation devices are connected to the directional antennas. The first simulation device is used to simulate a target device communicating with the device under test and establishes a test communication link with the device under test through the directional antenna connected to the first simulation device. The second simulation device is used to simulate an interfering device that causes communication interference to the device under test and establishes an interfering communication link with the device under test through the directional antenna connected to the second simulation device. The second simulation device is also used to establish communication links with other simulation devices to simulate communication between interfering devices. The host computer is connected to the first simulation device, the second simulation device, and the device under test. It is used to configure the communication simulation parameters of the first and second simulation devices, acquire the test communication data of the test communication link and the interference communication data of the interfering communication link, and determine the interference performance test result of the device under test based on the test communication data and the interfering communication data. This interference performance testing system builds a test link based on the actual interference environment, conducts simulated interference tests based on real data streams, comprehensively examines spectrum interference and collision mechanism algorithms, and accurately quantifies anti-interference performance. Therefore, this interference performance testing system can more closely reflect the real situation of actual business applications. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the interference performance testing system in one embodiment;

[0021] Figure 2 This is a schematic diagram of the interference performance testing system in another embodiment;

[0022] Figure 3 This is a schematic diagram of the interference performance testing system in another embodiment;

[0023] Figure 4 This is a schematic diagram of the interference performance testing system in another embodiment;

[0024] Figure 5 This is a schematic diagram of the interference performance testing system in another embodiment. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0027] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0028] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0029] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0030] With the increasing popularity of smart devices in people's daily lives, the data traffic volume of wireless networks on which these devices rely is experiencing explosive growth. Especially driven by the rapid increase in the number of connections and Metcalfe's Law, a new wave of iterations of intelligent connected terminals has begun across various industries. Cisco's Visual Network Index indicates that global mobile data traffic in 2022 will be 122 times that of ten years ago, with the number of mobile users reaching 5.7 billion and the number of mobile network access devices exceeding 12 billion. The emergence of a large number of mobile smart devices and the continuous innovation of their complementary applications require wireless networks to provide higher traffic support. Furthermore, to improve user experience, wireless network access services are required to be unrestricted by time and location. To achieve comprehensive network coverage and increase network capacity, a large number of wireless access points (APs) are deployed in densely populated areas such as shopping malls, hotels, stations, and campuses. However, wireless spectrum resources are limited, and the dense deployment of WiFi networks inevitably leads to channel contention among numerous APs. When the coverage areas of APs overlap, interference between adjacent APs will significantly degrade the performance of edge users and even the entire network. Therefore, effectively testing and evaluating the external interference and anti-interference capabilities of intelligent connected devices (including terminals and access points) is crucial for improving user experience and optimizing network structure.

[0031] In existing technologies, simulation calculations are used to evaluate the external interference and anti-interference capabilities of intelligent connected devices. Specifically, a system model is established based on dense network application scenarios, and scenario simulations are performed, primarily evaluating algorithm strategies and logic. Through power control, channel allocation, timing processing, and spatial optimization, the signal-to-interference plus noise ratio (SINR) of each node in the system is calculated to assess the interference situation in that scenario.

[0032] However, simulation calculations only assess interference phenomena theoretically, and do not adequately consider aspects such as radio frequency links, air interface scenarios, and antennas. Furthermore, they typically only consider the interference situation of the terminal and not the interference situation of the access point, making it difficult to demonstrate consistency with the actual situation.

[0033] In view of this, the embodiments of this application provide an interference performance testing system that takes into account all aspects, making the testing environment closely resemble the real situation of actual business applications.

[0034] In one exemplary embodiment, such as Figure 1The diagram shows a schematic of an interference performance testing system. The system 100 includes a host computer 101, a first simulation device 102, a second simulation device 103, and multiple directional antennas 104. Both the first and second simulation devices 102 and 103 are connected to the directional antennas 104. The first simulation device 102 simulates a target device communicating with the device under test 105 and establishes a communication link with the device under test 105 through the directional antennas 104 connected to it. The second simulation device 103 simulates an interfering device that causes communication interference to the device under test 105 and establishes a communication link with the device under test 105 through the directional antennas 104 connected to it. The directional antenna 104 connected to the simulation device 103 establishes an interference communication link with the device under test 105. The second simulation device 103 is also used to establish communication links with other simulation devices to simulate communication between interference devices. The host computer 101 is connected to the first simulation device 102, the second simulation device 103 and the device under test 105. It is used to configure the communication simulation parameters of the first simulation device 102 and the second simulation device 103, and to acquire the test communication data of the test communication link and the interference communication data of the interference communication link. Based on the test communication data and the interference communication data, it determines the interference performance test result of the device under test 105.

[0035] It should be noted that, in this embodiment of the application, the number of the first simulation device 102, the second simulation device 103 and the directional antenna 104 in the interference performance testing system 100 is not limited.

[0036] Optionally, this interference performance testing system is based on black-box testing and can be targeted at APs or stations (STAs). It can also be extended to multi-link control and add various interference devices at each level. The interference devices generate interference signals relative to the device under test, making the system closer to the real situation of actual business applications.

[0037] Optionally, other simulation devices can be the first simulation device 102 or other second simulation devices 103, as in the embodiments of this application, such as Figure 1 As shown, the interference performance testing system 100 is described using another simulation device as an example of a second simulation device.

[0038] Optional, such as Figure 1 As shown, the host computer 101 is connected to the first simulation device 102, the second simulation device 103 and the device under test 105 via network cables. The first simulation device 102 and the second simulation device 103 are connected to the directional antenna 104 via radio frequency cables.

[0039] Optionally, the first simulation device 102 and the second simulation device 103 can be multi-user WiFi simulators. The multi-user WiFi simulator supports multiple users, with a maximum of 32 users that can be simulated simultaneously. Each user can simulate a WiFi hotspot (AP) or station (STA). Information such as the frequency band (2.4G or 5G), standard (802.11b / g / n / ac / ax / be), channel, modulation and coding scheme (MCS), and communication bandwidth of the WiFi signal can be set through the first simulation device 102 and the second simulation device 103.

[0040] Optionally, the directional antenna 104 can be a directional linearly polarized antenna, which can be used to transmit and receive WiFi test signals and interference signals.

[0041] Optionally, in this embodiment, the interference performance testing system 100 performs interference testing on the device under test 105. However, the communication link needs to be jointly established by each simulation device and the device under test 105. Simultaneously, the testing process employs a channel contention method (electromagnetic wave power and collision mechanism), such as same-frequency interference testing or repetitive frequency interference testing. In actual testing, the directional antenna 104 in the interference communication link can be placed parallel to and pointed towards the device under test 105, while remaining perpendicular to the communication link under test, to restore the performance of the device under test 105 itself and reduce self-interference between systems.

[0042] The aforementioned interference performance testing system includes a host computer, a first simulation device, a second simulation device, and multiple directional antennas. Both the first and second simulation devices are connected to the directional antennas. The first simulation device is used to simulate a target device communicating with the device under test and establishes a test communication link with the device under test through the directional antenna connected to the first simulation device. The second simulation device is used to simulate an interfering device that causes communication interference to the device under test and establishes an interfering communication link with the device under test through the directional antenna connected to the second simulation device. The second simulation device is also used to establish communication links with other simulation devices to simulate communication between interfering devices. The host computer is connected to the first simulation device, the second simulation device, and the device under test. It is used to configure the communication simulation parameters of the first and second simulation devices, acquire the test communication data of the test communication link and the interference communication data of the interfering communication link, and determine the interference performance test result of the device under test based on the test communication data and the interfering communication data. This interference performance testing system builds a test link based on the actual interference environment, conducts simulated interference tests based on real data streams, comprehensively examines spectrum interference and collision mechanism algorithms, and accurately quantifies anti-interference performance. Therefore, this interference performance testing system can more closely reflect the real situation of actual business applications.

[0043] In one exemplary embodiment, based on the above embodiments, optionally, the second simulation device 103 is specifically used to establish a communication link with other second simulation devices 103; or, the first simulation device 102 is further used to simulate an interfering device that causes communication interference to the device under test, and the second simulation device 103 is specifically used to establish a communication link with other second simulation devices 103, or to establish a communication link with the first simulation device 102.

[0044] Optionally, the interference devices that cause communication interference to the device under test may include interference APs and interference STAs.

[0045] Optionally, in the embodiments of this application, the test links in the interference performance testing system are mainly built based on the actual interference environment, such as... Figure 2 The interference performance testing system can include four electromagnetic wave transmission paths: the first transmission path is the air interface transmission path between the device under test 201 and the target device 202; the second transmission path is the air interface transmission path between the interfering AP 203 and the interfering STA 204; the third transmission path is the interference path of the interfering AP 203 on the device under test 201; and the fourth transmission path is the interference path of the interfering STA 204 on the device under test 201. Simultaneously, the electromagnetic waves of the device under test can also interfere with the interfering AP 203 and the interfering STA 204 through the third and fourth transmission paths, creating a competitive situation between them, which is particularly important in recreating a real interference environment.

[0046] The aforementioned second simulation device is specifically used to establish a communication link with other second simulation devices; or, the first simulation device is also used to simulate an interfering device that causes communication interference to the device under test, and the second simulation device is specifically used to establish a communication link with other second simulation devices, or to establish a communication link with the first simulation device. Building a test link based on the actual interference environment can more closely reflect the real situation of actual business applications.

[0047] In one exemplary embodiment, such as Figure 3 As shown, based on the above embodiment, optionally, the system 100 further includes a first multipath simulator 106 and a second multipath simulator 107; the first multipath simulator 106 is disposed between the first simulation device 102 and the directional antenna 104 connected to the first simulation device, and is used to simulate the channel between the device under test 105 and the target device; the second multipath simulator 107 is disposed between the second simulation device 103 and the directional antenna 104 connected to the second simulation device, and is used to simulate the channel between the device under test 105 and the interference device.

[0048] It should be noted that, in the embodiments of this application, as Figure 3As shown, the interference performance testing system 100 is described using another simulation device as an example of a second simulation device.

[0049] Optionally, the host computer 101 is also connected to both the first multipath emulator 106 and the second multipath emulator 107; the host computer 101 is also used to configure the channel simulation parameters of the first multipath emulator 106 and the second multipath emulator 107.

[0050] Optionally, the first multipath emulator 106 and the second multipath emulator 107 have multiple channels, and the attenuation and multipath delay coupling of each channel can be controlled by a program. In other words, the first multipath emulator 106 and the second multipath emulator 107 have a programmable attenuator function, and the corresponding signal strength can be controlled by controlling the attenuation value of the corresponding path through the host computer 101.

[0051] The aforementioned system includes a first multipath simulator and a second multipath simulator. The first multipath simulator is positioned between a first simulation device and a directional antenna connected to the first simulation device, used to simulate the channel between the device under test and the target device. The second multipath simulator is positioned between a second simulation device and a directional antenna connected to the second simulation device, used to simulate the channel between the device under test and the jamming device. By precisely controlling each test link established in the system through the multipath simulator and the directional antenna, different channels can be simulated. The interference performance testing system has high controllability and high test repeatability.

[0052] In one exemplary embodiment, such as Figure 4 As shown, based on the above embodiment, optionally, the system 100 also includes a power divider 108. The input terminal of the power divider 108 is connected to the second analog device 103, the first output terminal of the power divider 108 is connected to the second multipath simulator 107, and the second output terminal of the power divider 108 is connected to other analog devices that establish a communication link with the second analog device 103.

[0053] It should be noted that, in the embodiments of this application, as Figure 4 As shown, the interference performance testing system 100 is described using another simulation device as an example of a second simulation device.

[0054] Optionally, the power divider 108 can be a 1-to-2 power divider, which can divide the transmission link into two: one is an interference communication link, where the first output of the power divider 108 is connected to the second multipath simulator 107 via conduction, and then the second multipath simulator 107 is connected to the directional antenna 104 via conduction; the other is a communication link between interference devices, where the second output of the power divider 108 is connected to other simulation devices via conduction.

[0055] Optionally, the above conduction method is achieved through cables, that is, the analog devices, directional antenna 104 and power divider 108 are connected by radio frequency lines.

[0056] The system also includes a power divider. The input of the power divider is connected to the second simulation device, the first output of the power divider is connected to the second multipath simulator, and the second output of the power divider is connected to other simulation devices that establish a communication link with the second simulation device. The test link built through the above connections can more closely simulate the actual interference flow channel competition situation.

[0057] In an exemplary embodiment, based on the above embodiments, optionally, the host computer 101 is specifically used to control the transmission of data on the communication link under test and to control the disconnection of the interfering communication link, so as to detect the first communication data corresponding to the communication link under test when the communication link under test transmits data alone; the host computer 101 is also used to control the transmission of data on the interfering communication link and to control the disconnection of the communication link under test, so as to detect the second communication data corresponding to the interfering communication link when the interfering communication link transmits data alone; the host computer 101 is also used to control the communication link under test and the interfering communication link to transmit data simultaneously, so as to detect the third communication data corresponding to the communication link under test and the fourth communication data corresponding to the interfering communication link when the communication link under test and the interfering communication link transmit data simultaneously.

[0058] Optionally, the host computer 101 controls the first and second simulation devices to perform link establishment and flow testing with the device under test. Flow testing is a method for testing the performance of network devices or applications. It evaluates system performance by simulating real network traffic. Through steps such as generating traffic data, transmitting traffic data, monitoring traffic, and evaluating performance, a comprehensive understanding of the system's performance under different load conditions can be obtained.

[0059] Optionally, the communication data includes throughput data; the host computer 101 is also used to calculate the throughput reduction rate of the tested communication link based on the throughput data in the first communication data and the throughput data in the third communication data, and to calculate the throughput reduction rate of the interfering communication link based on the throughput data in the second communication data and the throughput data in the fourth communication data; the host computer 101 is also used to determine the interference performance test result based on the throughput reduction rate of the tested communication link and the throughput reduction rate of the interfering communication link.

[0060] Optionally, throughput data can represent the amount of data passing through a network (or channel, interface) per unit time. Throughput data can include uplink throughput data and downlink throughput data.

[0061] Optionally, the throughput degradation rate of the tested communication link can be calculated by dividing the throughput data in the third communication data by the throughput data in the first communication data; alternatively, the difference between the throughput data in the third communication data and the throughput data in the first communication data can be calculated first, and then this difference can be divided by the throughput data in the first communication data. Meanwhile, the calculation method for the throughput degradation rate of the interfering communication link is similar to the above methods. It should be noted that there are multiple methods for calculating the throughput degradation rate, and this application does not limit this method.

[0062] Optionally, the communication data also includes communication latency; the host computer 101 is further used to calculate the latency difference data of the communication link under test based on the communication latency in the first communication data and the communication latency in the third communication data, and to calculate the latency difference data of the interfering communication link based on the communication latency in the second communication data and the communication latency in the fourth communication data; specifically, the host computer 101 is used to determine the interference performance test results based on the throughput reduction rate of the communication link under test, the throughput reduction rate of the interfering communication link, the latency difference data of the communication link under test, and the latency difference data of the interfering communication link.

[0063] Optionally, each simulation device has a message timestamp capture function. Based on this message timestamp capture function, the host computer 101 can obtain the communication delay. The delay difference data of the tested communication link can be obtained by calculating the difference between the communication delay in the first communication data and the communication delay in the third communication data. Similarly, the delay difference data of the interfering communication link can be obtained by calculating the difference between the communication delay in the second communication data and the communication delay in the fourth communication data. It should be noted that there are various methods for calculating the delay difference data, and this application does not limit this method.

[0064] Optionally, the host computer 101 is specifically used to determine the anti-interference capability test results of the device under test based on the throughput reduction rate and delay difference data of the communication link under test; the host computer 101 is specifically used to determine the external interference capability test results of the device under test based on the throughput reduction rate and delay difference data of the interfering communication link.

[0065] Optionally, the greater the throughput decrease rate of the tested communication link and the greater the delay difference data of the tested communication link, the worse the anti-interference capability of the tested device 105 is. Conversely, the greater the throughput decrease rate of the interfering communication link and the greater the delay difference data of the tested communication link, the stronger the external interference capability of the tested device 105 is.

[0066] The aforementioned host computer is specifically used to control the data transmission of the communication link under test and to disconnect the interfering communication link, in order to detect the first communication data corresponding to the communication link under test when it transmits data alone. The host computer is also used to control the data transmission of the interfering communication link and to disconnect the communication link under test, in order to detect the second communication data corresponding to the interfering communication link when it transmits data alone. Furthermore, the host computer is used to control the simultaneous transmission of data by both the communication link under test and the interfering communication link, in order to detect the third communication data corresponding to the communication link under test and the fourth communication data corresponding to the interfering communication link when both are transmitting data simultaneously. The communication data includes throughput data and communication latency. Simulated interference tests are performed based on actual WiFi data streams, comprehensively examining spectrum interference and collision mechanism algorithms to accurately quantify anti-interference performance. Throughput data and communication latency are used to quantitatively characterize communication services, which is closer to the real-world situation in actual business applications compared to other testing methods.

[0067] In one exemplary embodiment, such as Figure 5 As shown, based on the above embodiment, optionally, the system 100 also includes a rotary table 109, which is used to place the device under test; the rotary table 109 can rotate 360°, specifically used to control the relative orientation between the device under test and multiple directional antennas.

[0068] Optionally, the rotational accuracy of the rotary table 109 is 0.1°.

[0069] Optional, such as Figure 5 As shown, the system 100 also includes an anechoic chamber 110, which is used to house multiple directional antennas 104, the device under test 105, and a rotary table 109.

[0070] Optionally, anechoic chamber 110 is constructed of metal and is a fully anechoic chamber. Its interior is lined with absorbing material to shield external interference signals and improve the stability and repeatability of test results.

[0071] Optional, such as Figure 5As shown in the embodiments of this application, the interference performance testing system 100 is described in detail using other simulation devices as examples of other second simulation devices. The construction process of the interference performance testing system 100 mainly includes three parts: first, the construction of the communication link under test; second, the construction of the interference communication link; and third, the coupling of the air interface interference environment. When constructing the communication link under test, the device under test 105 is first placed on the rotating stage 109 of the anechoic chamber 110. The first simulation device 102 is placed outside the anechoic chamber 110 and connected to the first multipath simulator 106 through conduction. The first multipath simulator 106 is connected to the directional antenna 104 inside the anechoic chamber 110 through conduction, and finally establishes an air interface connection with the device under test 105. For the construction of the interference communication link including "interference AP" and "interference STA", the second simulation device 103 first divides the transmission link into two parts through the power divider 108 based on conduction. There are two links. One is a communication link between the jamming devices. The second output of the power divider 108 is connected to other simulation devices through conduction. The other is a jamming communication link. The first output of the power divider 108 is connected to the second multipath simulator 107 through conduction. Then, the second multipath simulator 107 is connected to the directional antenna 104 through conduction, and finally coupled to the air interface environment of the device under test 105. Optionally, after the host computer 101 installs the test software, it controls and calls the hardware devices in the system, sets the flow parameters, and reads the communication data to realize the automated execution of test cases.

[0072] The aforementioned method utilizes a fully anechoic chamber to simulate the wireless interference environment of real-world applications, testing the anti-interference and external interference capabilities of the equipment under test. This test can be automated in a laboratory, resulting in low labor costs and high testing efficiency. Furthermore, since the air interface of the test link is located in a fully anechoic chamber, the test environment is highly controllable, ensuring high test repeatability. Moreover, based on a real interference flow channel contention approach, it uses throughput quantification to characterize communication services, which more closely reflects the real-world conditions of actual business applications compared to other testing methods.

[0073] As an optional implementation, the specific testing process based on the interference performance testing system provided in this application embodiment may include the following specific steps:

[0074] The device under test 105 is placed on a rotating table in an anechoic chamber. The first simulation device 102 is connected to the device under test 105 through a simulated target device (AP or STA). At the same time, the first multipath simulator 106 is used to simulate and control the channel conditions of the communication link under test. The second simulation device 103 establishes an interference communication link through a simulated jamming device (jamming AP) and other jamming devices (jamming STA) simulated by the other simulation devices. At the same time, the second multipath simulator 107 is used to simulate and control the interference communication link of the jamming device (jamming AP or jamming STA) to the device under test 105.

[0075] The first step is for the host computer 101 to configure the relevant radio frequency, modulation, and current-passing parameters of the first analog device 102 and the second analog device 103 to the expected test parameters.

[0076] The second step is for the host computer 101 to configure the parameters of the first multipath simulator 106 and the second multipath simulator 107 to the test expectations, including multipath fading and time delay coupling.

[0077] The third step is for the host computer 101 to disconnect the interfering communication link, and then perform a benchmark flow test on the communication link under test, recording the throughput data T0 and communication delay of the communication link under test.

[0078] The fourth step is for the host computer 101 to disconnect the communication link under test, and then perform a benchmark flow test on the interfering communication link, recording the throughput data I0 and communication delay of the interfering communication link.

[0079] In the fifth step, the host computer 101 simultaneously performs stream filtering on both the interfering communication link and the communication link under test, and records the throughput data T1 of the communication link under test, the throughput data I1 of the interfering communication link, and the communication delay data of each link.

[0080] The sixth step is for the host computer 101 to normalize the recorded data to obtain the throughput reduction rate of the tested communication link, the throughput reduction rate of the interfering communication link, the latency difference data of the tested communication link, and the latency difference data of the interfering communication link.

[0081] Optional parameters for streaming include timing, buffer, protocol (TCP / UDP), and streaming time.

[0082] Optionally, the anti-interference and external interference capabilities of the tested device 105 can be evaluated by quantitatively comparing the throughput reduction rate and latency difference data of the tested communication link and the interfering communication link. The larger the throughput reduction rate and latency difference data of the tested communication link, the worse the anti-interference capability of the tested device 105 is. The larger the throughput reduction rate and latency difference data of the interfering communication link, the stronger the external interference capability of the tested device 105 is.

[0083] In one exemplary embodiment, based on the above embodiments, optionally, taking a WiFi router as the device under test for co-channel interference testing as an example, the working process of the interference performance testing system is described in detail:

[0084] The WiFi router is placed on a rotating platform 109 in the darkroom 110. The first simulation device 102 is connected to the WiFi router through a simulated target device (STA). At the same time, the first multipath simulator 106 is used to simulate and control the channel conditions of the communication link under test. The second simulation device 107 establishes an interference communication link through a simulated interference device (interference AP) and other interference devices (interference STA) simulated by the simulation device. At the same time, the second multipath simulator 107 is used to simulate and control the interference communication link of the interference device (interference AP or interference STA) to the WiFi router.

[0085] The first step is to configure the host computer 101 to output power of the first analog device 102 as 20dBm, 802.11ax, 40 channels, 80MHz bandwidth, 2X2 MIMO connection, and set the streaming parameters to TCP 10 streams parallel streaming for 120s.

[0086] The second step is to configure the second analog device 103 (jamming AP) and other analog devices (jamming STA) on the host computer 101 to have an output power of 20dBm, 802.11ax, 40 channels, 80MHz bandwidth, 2X2 MIMO connection, and set the streaming parameters to TCP 10 streams parallel streaming for 60s.

[0087] The third step is to configure the first multipath simulator 106 to apply an additional 10dB link attenuation and configure the second multipath simulator 107 to apply an additional 20dB attenuation.

[0088] The fourth step is for the host computer 101 to disconnect the interfering communication link, and then perform a benchmark flow test on the communication link under test, recording the average uplink throughput data Tu0, the average downlink throughput data Td0, and the communication delay.

[0089] The fifth step is for the host computer 101 to disconnect the communication link under test, and then perform a benchmark flow test on the interfering communication link, recording the average uplink throughput data Iu0, the average downlink throughput data Id0, and the communication delay.

[0090] Step 6: The host computer 101 first performs flow blocking on the communication link under test, and during the flow blocking of the communication link under test, it also performs flow blocking on the interfering communication link, and records the average uplink throughput data Tu1, Tu2, the average downlink throughput data Td1, Td2, the average uplink throughput data Iu1, Iu2, the average downlink throughput data Id1, Id2, and the communication delay in each link.

[0091] Optionally, since the current system's simulation devices are configured with 2x2 MIMO connections, the average throughput data of the uplink tested communication link, the average throughput data of the downlink tested communication link, the average throughput data of the uplink interference communication link, and the average throughput data of the downlink interference communication link are all in two sets.

[0092] The seventh step involves the host computer normalizing the recorded data to obtain the throughput reduction rate of the tested communication link, the throughput reduction rate of the interfering communication link, the latency difference data of the tested communication link, and the latency difference data of the interfering communication link.

[0093] Table 1

[0094]

[0095] Optionally, Table 1 provides a method for calculating the throughput degradation rate. DUT represents the device under test, and interference represents the interfering device. The formula 2*(Td0-Td1) / Td0 is used because the throughput data is the average throughput during the entire streaming process. However, in this embodiment, the streaming time of the tested communication link differs from that of the interfering communication link by a factor of two. Therefore, the throughput degradation rate of the tested communication link needs to be multiplied by 2 for consistent comparison. The interference resistance and external interference capability of the WiFi router are evaluated by quantitatively comparing the throughput degradation rate and latency difference data.

[0096] In one exemplary embodiment, based on the above embodiments, optionally, a smartphone is used as the device under test for frequency repetition rate (FRP) interference testing to specifically describe the working process of the interference performance testing system:

[0097] The smartphone is placed on a rotating stage 109 in the darkroom 110. The first simulation device 102 is connected to the smartphone through a simulated target device (AP). At the same time, the first multipath simulator 106 is used to simulate and control the channel conditions of the communication link under test. The second simulation device 107 establishes a communication link with the smartphone through a simulated jamming device (jamming AP) and other jamming devices (jamming STA) simulated by the simulation device. At the same time, the second multipath simulator 107 is used to simulate and control the jamming communication link of the jamming device (jamming AP or jamming STA) to the smartphone.

[0098] The first step is to configure the host computer 101 to output power of the first analog device 102 as 20dBm, 802.11ax, 40 channels, 80MHz bandwidth, 2X2 MIMO connection, and set the streaming parameters to TCP 10 streams parallel streaming for 120s.

[0099] The second step is to configure the second analog device 103 (jamming AP) and other analog devices (jamming STA) on the host computer 101 to have an output power of 20dBm, 802.11ax, 40 channels, 40MHz bandwidth, 2X2 MIMO connection, and set the streaming parameters to TCP 10 streams parallel streaming for 60s.

[0100] The third step is to configure the first multipath simulator 106 to apply an additional 10dB link attenuation, configure the second multipath simulator 107 to apply an additional 20dB attenuation, and set up Model B multipath coupling.

[0101] The fourth step is for the host computer 101 to disconnect the interfering communication link, and then perform a benchmark flow test on the communication link under test, recording the average uplink throughput data Tu0, the average downlink throughput data Td0, and the communication delay.

[0102] The fifth step is for the host computer 101 to disconnect the communication link under test, and then perform a benchmark flow test on the interfering communication link, recording the average uplink throughput data Iu0, the average downlink throughput data Id0, and the communication delay.

[0103] Step 6: The host computer 101 first performs flow blocking on the communication link under test, and during the flow blocking of the communication link under test, it also performs flow blocking on the interfering communication link, and records the average uplink throughput data Tu1, Tu2, the average downlink throughput data Td1, Td2, the average uplink throughput data Iu1, Iu2, the average downlink throughput data Id1, Id2, and the communication delay in each link.

[0104] The seventh step involves the host computer normalizing the recorded data to obtain the throughput reduction rate of the tested communication link, the throughput reduction rate of the interfering communication link, the latency difference data of the tested communication link, and the latency difference data of the interfering communication link.

[0105] Optionally, the anti-interference and external interference capabilities of smartphones can be assessed by quantifying and comparing throughput degradation rate and latency difference data.

[0106] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0107] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. An interference performance testing system, characterized in that, The system includes a host computer, a first simulation device, a second simulation device, multiple directional antennas, a first multipath simulator, and a second multipath simulator. Both the first simulation device and the second simulation device are connected to the directional antennas. The first simulation device is used to simulate a target device communicating with the device under test, and to establish a communication link between the device under test and the device under test through a directional antenna connected to the first simulation device. The second simulation device is used to simulate an interfering device that causes communication interference to the device under test, and to establish an interfering communication link with the device under test through a directional antenna connected to the second simulation device. The second simulation device is also used to establish a communication link with other simulation devices to simulate the communication between the interfering devices. The host computer is connected to the first simulation device, the second simulation device, and the device under test. It is used to configure the communication simulation parameters of the first simulation device and the second simulation device, and to acquire the communication data under test of the communication link under test and the interference communication data of the interference communication link. It is also used to determine the interference performance test result of the device under test based on the communication data under test and the interference communication data. The first multipath simulator is disposed between the first simulation device and the directional antenna connected to the first simulation device, and is used to simulate the channel between the device under test and the target device; The second multipath simulator is disposed between the second simulation device and the directional antenna connected to the second simulation device, and is used to simulate the channel between the device under test and the jamming device; The host computer is specifically used to control the transmission of data of the communication link under test and to control the disconnection of the interfering communication link, so as to detect the first communication data corresponding to the communication link under test when the communication link under test transmits data alone. The host computer is also used to control the data transmission of the interference communication link and to control the disconnection of the communication link under test, so as to detect the second communication data corresponding to the interference communication link when the interference communication link transmits data alone. The host computer is also used to control the simultaneous transmission of data between the communication link under test and the interference communication link, so as to detect the third communication data corresponding to the communication link under test and the fourth communication data corresponding to the interference communication link when the two are transmitting data simultaneously.

2. The system according to claim 1, characterized in that, The second analog device is specifically used to establish a communication link with other second analog devices; or, The first simulation device is also used to simulate an interfering device that causes communication interference to the device under test. The second simulation device is specifically used to establish a communication link with other second simulation devices, or to establish a communication link with the first simulation device.

3. The system according to claim 1, characterized in that, The host computer is also connected to both the first multipath simulator and the second multipath simulator; The host computer is also used to configure the channel simulation parameters of the first multipath simulator and the second multipath simulator.

4. The system according to claim 1, characterized in that, The system also includes a power divider, the input of which is connected to the second analog device, the first output of which is connected to the second multipath simulator, and the second output of which is connected to other analog devices that establish a communication link with the second analog device.

5. The system according to claim 1, characterized in that, The communication data includes throughput data; The host computer is also used to calculate the throughput reduction rate of the tested communication link based on the throughput data in the first communication data and the throughput data in the third communication data, and to calculate the throughput reduction rate of the interfering communication link based on the throughput data in the second communication data and the throughput data in the fourth communication data. The host computer is also used to determine the interference performance test results based on the throughput reduction rate of the tested communication link and the throughput reduction rate of the interfering communication link.

6. The system according to claim 5, characterized in that, The communication data also includes communication latency; The host computer is also used to calculate the delay difference data of the tested communication link based on the communication delay in the first communication data and the communication delay in the third communication data, and to calculate the delay difference data of the interfering communication link based on the communication delay in the second communication data and the communication delay in the fourth communication data. The host computer is specifically used to determine the interference performance test results based on the throughput reduction rate of the tested communication link, the throughput reduction rate of the interfering communication link, the latency difference data of the tested communication link, and the latency difference data of the interfering communication link.

7. The system according to claim 6, characterized in that, The host computer is specifically used to determine the anti-interference capability test results of the device under test based on the throughput reduction rate of the communication link under test and the latency difference data of the communication link under test. The host computer is specifically used to determine the test results of the external interference capability of the device under test based on the throughput reduction rate of the interference communication link and the latency difference data of the interference communication link.

8. The system according to claim 1, characterized in that, The system also includes a rotary table for placing the device under test. The rotary table can rotate 360°, specifically used to control the relative orientation between the device under test and the multiple directional antennas.

9. The system according to claim 8, characterized in that, The system also includes an anechoic chamber for housing the plurality of directional antennas, the rotary table, and the device under test.

10. The system according to claim 9, characterized in that, The anechoic chamber is constructed of metal and lined with wave-absorbing material.

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