CN118101092A

CN118101092A - Quality test method and device for communication link, test equipment and storage medium

Info

Publication number: CN118101092A
Application number: CN202211494193.1A
Authority: CN
Inventors: 陶成健; 周志丽; 冯宝军; 刘畅
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2024-05-28

Abstract

The application discloses a quality testing method and device for a communication link, testing equipment and a storage medium, and belongs to the technical field of communication. According to the application, the terminal to be tested is placed in the target place shielded from external electromagnetic interference, and the virtual cellular network is built by using the test equipment to simulate the signal environment of the communication link to be tested of the real external field, so that the test requirement of the real external field is simulated in the test scene, the test personnel is not required to manually take the fixed traffic line to realize the external field race test, the disturbance of some natural factors to the measurement process is shielded, and the stability and the test accuracy of the test index are relatively improved.

Description

Quality test method and device for communication link, test equipment and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and apparatus for testing quality of a communications link, a testing device, and a storage medium.

Background

With the development and progress of 5G (5 th Generation Mobile Communication Technology, fifth generation mobile communication technology), a significant feature of 5G on the wireless side is the introduction of massive array antennas, forming a massive MIMO (Multiple Input Multiple Output ) system. The MIMO technology refers to using a plurality of transmitting antennas and receiving antennas at a transmitting end and a receiving end of a signal, respectively, so that the signal is transmitted and received through the plurality of antennas at the transmitting end and the receiving end, so as to improve the signal quality of a communication link between the transmitting end and the receiving end.

At present, when a terminal in a MIMO system is used for testing the quality of a communication link, a tester is usually required to hold the terminal, a riding vehicle is used for carrying out data downloading service under a fixed line, so that test indexes of different communication links are compared, but the test environment is complex and changeable, the test indexes are greatly influenced by various factors such as weather, passenger flow, traffic environment and the like, the result of the test indexes is not stable enough, and the test accuracy is to be improved.

Disclosure of Invention

The embodiment of the application provides a quality testing method, device, testing equipment and storage medium for a communication link, which can shield disturbance of natural factors to the measuring process of the communication link, and relatively improve the stability and the testing accuracy of testing indexes. The technical scheme is as follows:

In one aspect, a method for testing the quality of a communication link is provided, which is executed by a testing device, where the testing device is used to test the channel quality of a communication link to be tested, where the communication link to be tested is accessed by a terminal to be tested, and the method includes:

creating a virtual cellular network, wherein the virtual cellular network is used for converting the Internet connected with the test equipment into a cellular network connected with the terminal to be tested;

the radio frequency signals generated aiming at the terminal to be tested are sent to the terminal to be tested in a target place through the virtual cellular network, and the target place is used for shielding external electromagnetic interference;

Receiving a response signal returned by the terminal to be tested through the virtual cellular network;

And determining the channel quality of the communication link to be measured based on the radio frequency signal and the response signal which are measured for a plurality of times.

In some embodiments, the creating a virtual cellular network comprises:

Determining scene simulation parameters for the terminal to be tested based on scene sampling parameters of a sample communication link, wherein the scene sampling parameters indicate signal environments of the sample communication link, and the scene simulation parameters indicate the signal environments of the communication link to be tested to be simulated for the terminal to be tested;

The virtual cellular network is created based on the scene simulation parameters.

In some embodiments, a channel simulator is disposed in the virtual cellular network, the channel simulator being configured to simulate the communication link under test, and a power amplifier being configured to power amplify the radio frequency signal;

the sending the radio frequency signal generated for the terminal to be tested to the terminal to be tested in the target place through the virtual cellular network comprises the following steps:

processing the radio frequency signal through the channel simulator to obtain an analog signal;

amplifying the power of the analog signal through the power amplifier to obtain an amplified signal;

and sending the amplified signal to the terminal to be tested in the target place.

In some embodiments, the virtual cellular network is further provided with a comprehensive tester and a radio frequency switch, wherein the comprehensive tester is used for sending radio frequency signals and receiving response signals, and the radio frequency switch is used for switching communication links;

Before the radio frequency signal is processed by the channel simulator to obtain an analog signal, the method further comprises:

generating the radio frequency signal aiming at the terminal to be tested through the comprehensive tester;

And switching from a plurality of communication links to the communication link to be tested through the radio frequency switch.

In some embodiments, a plurality of measurement antennas and a plurality of communication antennas are arranged in the target place, the measurement antennas are used for transmitting downlink signals to the terminal to be tested, and the communication antennas are used for transmitting response signals to the test equipment;

The transmitting the amplified signal to the terminal under test located in the target site includes:

transmitting the amplified signals to the terminal to be tested through the plurality of measuring antennas;

The receiving the response signal returned by the terminal to be tested through the virtual cellular network comprises the following steps:

And receiving the response signals returned by the terminal to be tested through the plurality of communication antennas.

In some embodiments, the determining the channel quality of the communication link under test based on the radio frequency signal and the response signal of the plurality of measurements comprises:

Performing multiple measurements on the communication link to be measured, wherein in the multiple measurements, the channel fading condition of the communication link to be measured is simulated based on the channel simulator;

acquiring at least one test index value of the communication link to be tested based on the radio frequency signals and the response signals which are measured for a plurality of times;

and determining the channel quality of the communication link to be tested based on the at least one test index value.

In some embodiments, each output branch of the channel simulator is connected to one measurement antenna in the target site to control channel fading conditions of the communication link under test accessed to the terminal under test through the measurement antenna by the output branch.

In some embodiments, the target site is an anechoic chamber or an all anechoic chamber.

In one aspect, a device for testing the channel quality of a communication link to be tested, which is accessed by a terminal to be tested, is provided, the device includes:

the creation module is used for creating a virtual cellular network, and the virtual cellular network is used for converting the Internet connected with the test equipment into a cellular network connected with the terminal to be tested;

the transmitting module is used for transmitting the radio frequency signal generated aiming at the terminal to be tested to the terminal to be tested in a target place through the virtual cellular network, wherein the target place is used for shielding external electromagnetic interference;

the receiving module is used for receiving a response signal returned by the terminal to be tested through the virtual cellular network;

and the determining module is used for determining the channel quality of the communication link to be measured based on the radio frequency signals and the response signals which are measured for a plurality of times.

In some embodiments, the creation module is to:

In some embodiments, a channel simulator is disposed in the virtual cellular network, the channel simulator being configured to simulate the communication link under test, and a power amplifier being configured to power amplify the radio frequency signal; the sending module is used for:

In some embodiments, the virtual cellular network is further provided with a comprehensive tester and a radio frequency switch, wherein the comprehensive tester is used for sending radio frequency signals and receiving response signals, and the radio frequency switch is used for switching communication links; the sending module is further configured to:

The sending module is further configured to: transmitting the amplified signals to the terminal to be tested through the plurality of measuring antennas;

the receiving module is further configured to: and receiving the response signals returned by the terminal to be tested through the plurality of communication antennas.

In some embodiments, the determining module is to:

In one aspect, a test apparatus is provided that includes one or more processors and one or more memories having stored therein at least one computer program loaded and executed by the one or more processors to implement a method of quality testing of a communication link as in any of the possible implementations described above.

In one aspect, a computer readable storage medium having stored therein at least one computer program loaded and executed by a processor to implement a method of quality testing of a communication link as any one of the possible implementations described above is provided.

In one aspect, a computer program product is provided that includes one or more computer programs stored in a computer-readable storage medium. The one or more processors of the test device are capable of reading the one or more computer programs from the computer-readable storage medium, the one or more processors executing the one or more computer programs such that the test device is capable of performing the quality test method of the communication link of any of the possible embodiments described above.

The technical scheme provided by the embodiment of the application has the beneficial effects that at least:

The terminal to be tested is placed in the target place shielded from external electromagnetic interference, and the virtual cellular network is built by using the test equipment to simulate the signal environment of the communication link to be tested of the real external field, so that the test requirement of the real external field is simulated in the test scene, a tester is not required to take a fixed traffic line manually to realize the external field race test, disturbance of some natural factors to the measurement process is shielded, and the stability and the test accuracy of the test index are relatively improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of an implementation environment of a method for testing quality of a communication link according to an embodiment of the present application;

Fig. 2 is a flowchart of a method for testing quality of a communication link according to an embodiment of the present application;

fig. 3 is a flowchart of a method for testing quality of a communication link according to an embodiment of the present application;

Fig. 4 is a schematic structural diagram of a quality testing apparatus for a communication link according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a test apparatus according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

The terms "first," "second," and the like in this disclosure are used for distinguishing between similar elements or items having substantially the same function and function, and it should be understood that there is no logical or chronological dependency between the terms "first," "second," and "n," and that there is no limitation on the amount and order of execution.

The term "at least one" in the present application means one or more, and "a plurality" means two or more, for example, a plurality of communication links means two or more.

The term "comprising at least one of A or B" in the present application relates to the following cases: only a, only B, and both a and B.

The user related information (including but not limited to user equipment information, personal information, behavior information, etc.), data (including but not limited to data for analysis, stored data, presented data, etc.) and signals referred to in the present application, when applied to a specific product or technology by the method of the present application, are all licensed, agreed, authorized, or fully authorized by the user, and the collection, use, and processing of the related information, data, and signals is required to comply with relevant laws and regulations and standards of the relevant country and region. For example, the radio frequency signals involved in the present application are all acquired with sufficient authorization.

Hereinafter, terms related to the embodiments of the present application will be explained.

MIMO (Multiple Input Multiple Output ): MIMO technology refers to the use of multiple transmitting and receiving antennas at a transmitting end and a receiving end, respectively, so that signals are transmitted and received through the multiple antennas at the transmitting end and the receiving end, thereby improving communication quality. The MIMO technology can fully utilize space resources, realize multiple transmission and multiple reception through a plurality of antennas, and can doubly improve the system channel capacity without increasing the frequency spectrum resources and the antenna transmitting power, thereby showing obvious advantages. In the test scene of the embodiment of the application, the measuring antenna accessed by the terminal to be tested is used as a receiving antenna, and the communication antenna accessed by the terminal to be tested is used as a transmitting antenna, so that MIMO of the terminal to be tested is realized.

Anechoic chamber (Anechoic Chamber): the anechoic chamber mainly comprises a shielding chamber and a wave absorbing material. The shielding room is composed of a shielding shell, a shielding door, a ventilation waveguide window, various power filters and the like. According to the requirements of users, the shielding shell can adopt a welded type or assembled type structure. The wave-absorbing material is composed of a single-layer ferrite sheet with the working frequency range of 30 MHz-1000 MHz and a conical carbon-containing sponge wave-absorbing material, wherein the conical carbon-containing sponge wave-absorbing material is formed by the penetration of polyurethane foam plastics in a carbon gel solution, and has better flame-retardant property. Anechoic chambers are closed shielded chambers that are used mainly for simulating Open Area Test (OAT) and for radioharassment and radiosensitivity measurements. In the test scene of the embodiment of the application, the anechoic chamber can be used as a target place for placing the terminal to be tested, and the size of the anechoic chamber and the selection of the wave absorbing material are determined according to the size of the terminal to be tested and the test requirement. Generally, for radiation tests, the test sites of anechoic chambers are divided into: the radiation tests performed in the three test sites can be generally considered to be in accordance with the propagation rule of electromagnetic waves in free space.

Full anechoic chamber: the electromagnetic wave darkroom is specially used for measuring electromagnetic compatibility and paving an electromagnetic wave absorbing material on the ground. The full anechoic chamber reduces the interference of external electromagnetic wave signals on test signals, and meanwhile, the electromagnetic wave absorbing material can reduce the multipath effect influence on test results caused by the reflection of walls and ceilings, so that the full anechoic chamber is suitable for emission, sensitivity and immunity experiments. The free space can be simulated in the anechoic chamber. Compared with other two test sites, the ground, the ceiling and the wall of the full anechoic chamber have the advantages of minimum reflection, minimum interference by external environment and no influence by external weather.

Semi-anechoic chamber: the semi-anechoic chamber is similar to the full-anechoic chamber, is also a hexahedral box body with shielding design, and is internally covered with electromagnetic wave absorbing materials, and is different in that the semi-anechoic chamber uses a conductive floor and is not covered with the electromagnetic wave absorbing materials. The semi-anechoic chamber simulates an ideal open field situation, i.e. the field has an infinitely large good conductive ground plane. In a semi-anechoic chamber, since the ground is not covered with a wave absorbing material, a reflection path will be created, so that the signal received by the receiving antenna will be the sum of the direct path and the reflection path signals.

Open field: the open field is an elliptical or circular test field which is flat, open, uniform and good in conductivity and free of any reflector, and the ideal open field ground has good conductivity and infinite area. However, in practical applications, although good ground conductivity can be obtained, the area of open field is limited, and thus a phase difference between the transmitting antenna and the receiving antenna may be caused. In the emission test, the open field was used the same as a half anechoic chamber.

Wave absorbing material: wave absorbing materials refer to materials that absorb or substantially attenuate electromagnetic wave energy received at their surfaces, thereby reducing electromagnetic wave interference. In engineering application, the wave absorbing material is required to have light weight, heat resistance, moisture resistance, corrosion resistance and the like besides high absorptivity of electromagnetic waves in a wider frequency band.

AAU (ACTIVE ANTENNA Unit ): AAU is the primary equipment of 5G base stations and is an implementation of a large-scale antenna array. The AAU can be seen as a combination of RRU and antenna, integrating multiple T/R units (i.e. radio frequency transceiver units).

The system architecture of the embodiment of the present application is described below.

Fig. 1 is a schematic diagram of an implementation environment of a quality testing method for a communication link according to an embodiment of the present application. Referring to fig. 1, in the test system including the test device 110 and the terminal under test 120, the test device 110 and the terminal under test 120 can be directly or indirectly connected through wired or wireless communication, and the present application is not limited herein.

The test device 110 is used for testing the channel quality of the communication link to be tested, which is accessed by the tested terminal 120, and an application supporting automatic testing is installed and run on the test device 110, for example, the application is a test application or a development application inheriting a test function, and the type of the application is not specifically limited in the embodiment of the present application.

The test device 110 may be a test machine, or a test server cluster or a distributed system formed by multiple test machines, or a cloud server that provides cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDNs (Content Delivery Network, content delivery networks), and basic cloud computing services such as big data and artificial intelligence platforms.

In some embodiments, the test device 110 is communicatively connected to a base station of an external network, so as to implement data interaction with the external network, for example, the external network obtains scene sampling parameters of a sample communication link collected by the base station side.

In some embodiments, the test equipment 110 creates a virtual cellular network 130 for the terminal under test 120, the virtual cellular network 130 being used to convert the internet connected to the test equipment 110 into a cellular network connected to the terminal under test 120.

In some embodiments, the terminal 120 to be tested is also referred to as a tested terminal, and the terminal 120 to be tested may be a smart phone, a tablet computer, a notebook computer, a desktop computer, a smart speaker, a smart watch, etc., but is not limited thereto. The terminal 120 to be tested may be placed inside the target site 140, where the target site 140 is used to shield electromagnetic interference from the outside, for example, the target site 140 may be an anechoic chamber, and in particular, the target site 140 may also be an anechoic chamber.

In some embodiments, in the virtual cellular network 130 described above, the following facilities are also configured: the comprehensive tester 131, the radio frequency switch 132, the channel simulator 133 and the power amplifier 134 are sequentially cascaded in the virtual cellular network 130 through radio frequency wires, and the radio frequency wires are used for establishing link connection in the virtual cellular network 130. The integrated tester 131 is used for sending radio frequency signals and receiving response signals, the radio frequency switch 132 is used for switching the communication link to be tested in the test between different communication links, the channel simulator 133 is used for simulating the signal environment of the communication link to be tested, and the power amplifier 134 is used for amplifying the power of the radio frequency signals.

In one exemplary scenario, a user starts a test application on the test device 110, the test application automatically runs a test code, and records a test index value for a communication link to be tested, and further, the channel quality of the communication link to be tested can be automatically determined according to the test index value, so as to implement automation of a test process. Optionally, the user may also perform the above-mentioned test procedure of the single communication link to be tested separately for different multiple communication links. The test equipment 110 then communicates data with the virtual cellular network 130 via the internet, optionally to maximize power, a tera-network card is provided in the test equipment 110 and the virtual cellular network 130 to allow data signals to be transmitted at maximum power via the optical fiber.

In some embodiments, the virtual cellular network 130 converts the internet into a cellular network that communicates with the terminal under test 120, and since the virtual cellular network 130 is connected to the synthesizer 131 through a radio frequency line, the synthesizer 131 can generate a radio frequency signal when the virtual cellular network 130 indicates that the test is started. Then, the integrated tester 131 sends the radio frequency signal to the radio frequency switch 132 through the radio frequency line, and the radio frequency switch 132 is used for deciding which communication link of the plurality of communication links to select as the communication link to be tested at this time. Then, the radio frequency signal generated by the comprehensive tester 131 is sent down to the channel simulator 133 through the communication link to be tested selected by the radio frequency switch 132, and the channel simulator 133 is used for processing the radio frequency signal to simulate the signal environment when the radio frequency signal propagates in the external field, so as to obtain the processed analog signal. Then, the analog signal output by the channel simulator 133 is transmitted to the power amplifier 134 through the radio frequency line, and the power amplifier 134 is used for power amplifying the analog signal to obtain an amplified signal. The amplified signal is then transmitted over a radio frequency line to the terminal under test 120 located within the target site 140.

In some embodiments, the terminal 120 to be tested is placed in a target location 140 that can shield external electromagnetic interference, for example, the target location 140 is a full anechoic chamber or other types of anechoic chambers, and the full anechoic chamber is exemplified by a full anechoic chamber test environment with wave absorbing materials.

Optionally, in the target site 140, a plurality of measurement antennas and a plurality of communication antennas are configured by MIMO technology, where the measurement antennas are used to transmit downlink signals (i.e., amplified signals) from the power amplifier 134 to the terminal 120 under test, and the communication antennas are used to transmit uplink signals (i.e., response signals) generated by the terminal 120 under test back to the comprehensive tester 131.

In some embodiments, for a certain to-be-tested communication link, the test device 110 counts the radio frequency signals of different services and the test index values of the response signals in multiple measurements to obtain the channel quality of the to-be-tested communication link, and further, each of the multiple communication links may be used as the to-be-tested communication link to execute the above channel quality test procedure, which is not limited herein.

The test flow of the embodiment of the application is briefly described below.

Fig. 2 is a flowchart of a method for testing quality of a communication link according to an embodiment of the present application. Referring to fig. 2, this embodiment is performed by a test apparatus for testing channel quality of a communication link under test to which a terminal under test accesses, the embodiment comprising the steps of:

201. The test equipment creates a virtual cellular network for converting the internet connected to the test equipment into a cellular network connected to the terminal under test.

In some embodiments, an APK (Android Application Package ) of the test application is installed on the test device, the user starts the test application through the APK, and after inputting a test start instruction in the test application, the test application automatically creates a virtual cellular network, which can convert external internet into a cellular network for communication with the terminal to be tested.

202. The test equipment sends the radio frequency signal generated aiming at the terminal to be tested to the terminal to be tested in a target place through the virtual cellular network, wherein the target place is used for shielding external electromagnetic interference.

In some embodiments, the test device generates a radio frequency signal for the terminal to be tested, for example, the test device generates an initialized radio frequency signal, or the terminal to be tested first sends a service request, and then the test device generates a radio frequency signal according to the service request to transmit service data requested by the service request.

In some embodiments, after the test device generates the radio frequency signal, the virtual cellular network created in step 201 sends the radio frequency signal to the terminal to be tested in the target location, where the target location is a location capable of shielding electromagnetic interference from the outside, for example, the target location is an anechoic chamber, and in particular, the target location is an anechoic chamber.

203. And the test equipment receives a response signal returned by the terminal to be tested through the virtual cellular network.

In some embodiments, the terminal to be tested in the target site may receive the radio frequency signal in step 202 through the multiple measurement antennas, and generate a corresponding response signal according to the radio frequency signal, and then the terminal to be tested may return the response signal through the multiple communication antennas, so as to implement MIMO technology on the terminal to be tested. Optionally, the test device receives a response signal returned by the terminal under test through a multipath communication antenna in the virtual cellular network.

204. The test equipment determines the channel quality of the communication link under test based on the radio frequency signal and the response signal measured multiple times.

In some embodiments, the test device may repeat the above steps 202 to 203 in the virtual cellular network multiple times, for example, by switching different services accessed by the terminal to be tested, so as to implement multiple measurements under different services for the communication link to be tested, or perform multiple measurements of the communication link to be tested for the same service accessed by the terminal to be tested, and the measurement mode is not specifically limited in the embodiments of the present application.

In some embodiments, a test index value of the communication link to be tested is determined according to a radio frequency signal and a response signal which are measured for a plurality of times under the same communication link to be tested, and the channel quality of the communication link to be tested is determined according to the test index value.

According to the method provided by the embodiment of the application, the terminal to be tested is placed in the target place shielded from external electromagnetic interference, and the virtual cellular network is built by using the test equipment to simulate the signal environment of the real external field communication link to be tested, so that the test requirement of the real external field is simulated in the test scene, the test personnel is not required to take a fixed traffic line manually to realize the external field race test, the disturbance of some natural factors to the measurement process is shielded, and the stability and the test accuracy of the test index are relatively improved.

In some embodiments, creating the virtual cellular network comprises:

Determining a scene simulation parameter for the terminal to be tested based on a scene sampling parameter of the sample communication link, the scene sampling parameter indicating a signal environment of the sample communication link, the scene simulation parameter indicating a signal environment of simulating the communication link to be tested for the terminal to be tested;

transmitting the radio frequency signal generated for the terminal to be tested to the terminal to be tested located in the target place through the virtual cellular network comprises the following steps:

Amplifying the power of the analog signal by the power amplifier to obtain an amplified signal;

The radio frequency signal is processed by the channel simulator, and before the analog signal is obtained, the method further comprises:

transmitting the amplified signal to the terminal under test located within the target site includes:

In some embodiments, determining the channel quality of the communication link under test based on the radio frequency signal and the response signal measured multiple times comprises:

Performing a plurality of measurements on the communication link to be measured, wherein in the plurality of measurements, a channel fading condition of the communication link to be measured is simulated based on the channel simulator;

Acquiring at least one test index value of the communication link to be tested based on the radio frequency signal and the response signal which are measured for a plurality of times;

In some embodiments, each output branch of the channel simulator is connected to a measurement antenna in the target site to control channel fading conditions of the communication link under test accessed to the terminal under test through the measurement antenna.

All the above optional solutions can be combined to form an optional embodiment of the present disclosure, which is not described in detail herein.

Hereinafter, a test procedure according to an embodiment of the present application will be described in detail.

Fig. 3 is a flowchart of a method for testing quality of a communication link according to an embodiment of the present application. Referring to fig. 3, the embodiment is implemented by interaction between a test device and a terminal to be tested, where the test device is used to test the channel quality of a communication link to be tested accessed by the terminal to be tested, and the embodiment includes the following steps:

301. the test equipment creates a virtual cellular network in which a comprehensive tester, radio frequency switch, channel simulator, and power amplifier are disposed.

The virtual cellular network is used for converting the Internet connected with the test equipment into a cellular network connected with the terminal to be tested.

The comprehensive tester is used for sending radio frequency signals and receiving response signals, the radio frequency switch is used for switching communication links, the channel simulator is used for simulating the communication links to be tested, and the power amplifier is used for amplifying power of the radio frequency signals.

In some embodiments, the test device may establish a connection with a base station of an external network to receive a scene sampling parameter of a sample communication link collected or counted by the base station, the scene sampling parameter indicating a signal environment of the sample communication link, and then a test application is installed and run on the test device, through which a subsequent test procedure can be automatically implemented. For example, after the test device starts the test application, the user inputs a test start instruction on the test application, and the test application may receive the scene sampling parameter sent by the external base station, or query the scene sampling parameter in stock locally, or request the scene sampling parameter from the external base station. Then, the test application may determine a scene simulation parameter for the terminal under test based on the scene sampling parameter for the sample communication link, the scene simulation parameter indicating a signal environment for the terminal under test to simulate the communication link under test. Illustratively, the test application derives scene simulation parameters from scene sampling parameters by a channel model of the channel simulator, which is used to derive simulation parameters of the test channel from sampling parameters of the outfield channel, e.g., the scene sampling parameters are input into the channel model, by which the scene simulation parameters are generated. The test application then creates the virtual cellular network based on the scene simulation parameters.

302. The test equipment generates the radio frequency signal for the terminal to be tested through the comprehensive tester.

In some embodiments, the test device may configure a comprehensive tester in the virtual cellular network to generate and send a downlink radio frequency signal through the comprehensive tester, and receive an uplink response signal through the comprehensive tester, so that the radio frequency signal and the response information of multiple tests can be conveniently summarized, so as to implement statistics and measurement and calculation of the test index value.

In some embodiments, the test device may generate a radio frequency signal to the terminal to be tested by using the comprehensive tester, for example, generate an initialized radio frequency signal, or generate a radio frequency signal carrying service data according to a service request initiated by the terminal to be tested.

303. The test equipment is switched from a plurality of communication links to the communication link to be tested through the radio frequency switch.

In some embodiments, the test device may be configured with a radio frequency switch in the virtual cellular network for switching among different communication links, for example, in the case of having n (n+.2) communication links in total, the radio frequency switch may have n gear positions, each corresponding to one communication link, so that by placing the radio frequency switch in different gear positions, it is possible to flexibly and dynamically switch to different communication links to be tested.

In some embodiments, the test device randomly selects one communication link which has not been measured from the plurality of communication links as a communication link to be tested, or the test device selects the communication link to be tested according to a preset test sequence, or the test device selects the communication link to be tested according to a preset priority. After the communication link to be measured is selected, the radio frequency switch is placed in a gear corresponding to the communication link to be measured, so that the communication link to be measured is used for transmitting radio frequency signals in subsequent measurement.

304. The test equipment processes the radio frequency signal through the channel simulator to obtain an analog signal.

In some embodiments, since the test apparatus creates a virtual cellular network according to the scene simulation parameters in step 301 described above, to simulate the signal environment of the communication link under test for the terminal under test. In order to better simulate and simulate the signal environment, the test device may process the radio frequency signal generated by the comprehensive tester in step 302 by using the channel simulator for the signal environment indicated by the above scene simulation parameters to generate an analog signal when transmitted in the signal environment, that is, the analog signal is obtained by transforming the original radio frequency signal. Optionally, the radio frequency signals can be processed according to the throughput under different simulation scenes to obtain the simulation signals under the condition of the specified throughput, and the performance test under the condition of different throughput can be simulated by generating different simulation signals, so that the iterative optimization of the product performance is facilitated.

305. The test equipment amplifies the power of the analog signal through the power amplifier to obtain an amplified signal.

In some embodiments, the test device may be further connected in series to a power amplifier after the channel simulator, where the power amplifier is configured to amplify the analog signal to obtain an amplified signal, so that the power loss of the analog signal after the processing can be avoided, and the signal is distorted in the transmission process, and it needs to be noted that the content of the signal is not changed by the power amplification.

306. The test equipment transmits the amplified signals to a terminal to be tested located in the target place through a plurality of measuring antennas arranged in the target place.

The target place is used for shielding external electromagnetic interference. Alternatively, the target site may be an anechoic chamber or an all-anechoic chamber, and of course, may be other sites provided with a wave absorbing material, such as a half anechoic chamber, an open field, etc., and the type of the target site is not particularly limited.

In some embodiments, a plurality of measurement antennas and a plurality of communication antennas may be disposed in the target location, where the measurement antennas are used to transmit downlink signals to the terminal to be tested, and the communication antennas are used to transmit response signals to the test device, so that a MIMO system can be built in the target location, and quality of a communication link of the terminal to be tested in the MIMO system can be accurately tested, so as to achieve a higher simulation effect.

In some embodiments, after the power amplifier generates the amplified signal, the amplified signal is sent to the terminal to be tested through a plurality of measurement antennas in the target place, so that the target place can shield external electromagnetic interference, and the power amplifier can be built in a laboratory environment, so that performance test of the MIMO system in specific scenes such as 5G and the like can be fully satisfied, and the power amplifier has high controllability, stable test environment, is favorable for improving stability and test accuracy of test results, and can also perform effective feedback aiming at the tested problems, thereby greatly facilitating update iteration of products.

In the steps 302-306, a possible implementation manner of transmitting the radio frequency signal generated for the terminal to be tested to the terminal to be tested in the target place through the virtual cellular network is provided, because the signal environment of the external field is simulated through the virtual cellular network, but the real external field is not required to be subjected to race test, the simulated external field test system can be formed by recording various scene sampling parameters in the real external field environment, performing data processing, fitting verification and playback through a channel simulator, the simulated signal with very high simulation degree can be simulated in the virtual cellular network, the test or verification of rich test scenes can be realized in one target place through adjusting the scene simulation parameters, the technician can customize the test case in the specific signal environment, the geographical position and the specific instrument of the external field test are not limited, the occupied area of the target place is small, the test cost is greatly reduced, the influence of random errors such as weather on the test result is small, the test result can be reproduced, the test efficiency is high, and the like.

307. And the terminal to be tested returns response signals to the test equipment through a plurality of communication antennas arranged in the target place.

In some embodiments, after receiving the amplified signal, the terminal under test in the target site performs relevant business logic based on the amplified signal and generates a response signal to the amplified signal, which is then returned to the test equipment via the plurality of communication antennas in the target site. The related business logic can be flexibly adjusted by a tester, the related business logic is determined by a business accessed by the tester in the test, and the types of the business include but are not limited to: multimedia services such as voice, video, etc., gaming services, payment services, etc.

In some embodiments, a tester starts a service application on a terminal to be tested, and establishes a communication connection between the service application on the terminal to be tested and a test application on a test device, where a communication link represented by the communication connection is a communication link to be tested in the test. After a tester triggers a service request on a service application, the service request is sent to the test application through a plurality of communication antennas, the test application can communicate with an external network base station aiming at the service request, service data related to the service request is obtained, a comprehensive tester generates a radio frequency signal carrying the service data, and then the radio frequency signal is sent to a terminal to be tested through a plurality of measurement antennas through an amplified signal processed by a radio frequency switch, a channel simulator and a power amplifier. Then, the service application on the terminal to be tested receives the amplified signal, executes relevant service logic according to the amplified signal, and generates and returns a response signal associated with the radio frequency signal. By controlling different services of the request, the related index of the channel quality of the communication link to be tested reaching the service requirement under various service scenes can be simulated, which has important significance for measuring the channel quality.

308. And the test equipment receives the response signals returned by the terminal to be tested through the plurality of communication antennas.

In some embodiments, the test device receives, through a plurality of communication antennas, a response signal returned by the terminal to be tested through the virtual cellular network, and then may generate a reply radio frequency signal again for the response signal, or return to step 302 to start the next round of testing under the processing logic of the test application, which is not specifically limited in the embodiments of the present application.

309. The test equipment determines the channel quality of the communication link under test based on the radio frequency signal and the response signal measured multiple times.

In some embodiments, the test device may iterate steps 302-308 for a plurality of times for a same communication link to be tested, so as to perform a plurality of measurements on the communication link to be tested, and obtain the radio frequency signal and the response signal for a plurality of measurements.

In some embodiments, the test equipment may simulate channel fading conditions of the communication link under test based on the channel simulator over the multiple measurements. Optionally, each output branch of the channel simulator is connected with one measuring antenna in the target place, so as to control the channel fading condition of the to-be-measured communication link accessed to the to-be-measured terminal through the measuring antenna by the output branch, wherein the channel fading condition refers to that the channel model gradually decays along with the time in terms of time delay, power and other indexes according to the standard.

In some embodiments, the channel simulator may employ a UMA (Urban Macrocell) channel model or a UMI (Urban Microcell ) channel model when performing the simulation of the signal environment, and by connecting each measurement antenna in the target site to one output branch of the channel simulator, it is possible to simulate that a plurality of path signals in the UMA or UMI channel model reach the terminal to be tested from different angles almost simultaneously. Since the test equipment acts as a "base station" in the virtual cellular network under test scenarios, a channel simulator is connected between the test equipment and the measurement antennas, by which various scenario simulation parameters of the UMA or UMI channel model can be modified or adjusted, such as scenario simulation parameters including but not limited to: path loss, multipath fading, delay spread, angle spread, etc., such scene simulation parameters are accurate, controllable and fully reproducible to adjust, and do not introduce additional interference from most contingencies in the outfield test.

In some embodiments, using the channel simulator, different types of radio frequency environments may also be established in the target site, that is, by processing radio frequency signals by the channel simulator, analog signals transmitted in different signal environments can be simulated, where the simulatable signal environments include, but are not limited to: indoor, urban microcells, urban macrocells, suburban areas, etc., have extremely rich, highly controllable test environments.

In some embodiments, since The channel simulator has The capability of completely controlling The channel Model by software, that is, the channel simulator is a software functional module integrated by The test equipment in The test application, the channel simulator can convert The SCM (SPATIAL CHANNEL Model ) into an OTA (Over-The-air technology) Model of The MIMO system through a mapping algorithm method, and can be well adapted to The test case of The terminal to be tested in The MIMO system. For example, the channel simulator provides a separate output branch for each OTA measurement antenna to facilitate the establishment of the electromagnetic environment required for the MIMO system within the target site. In the target site, each path signal in the channel has its own AoA (Angle-of-Arrival) information, and the path signals can be allocated to different OTA measurement antennas according to the AoA information, so that the direction information in the channel model can be properly loaded into the OTA measurement antennas in the target site.

In some embodiments, the test device collects and sums the rf signal and the response signal of the multiple measurements through the heald meter, for example, the test application counts Log (Log) of the multiple measurements through the functional module of the heald meter, so as to obtain the rf signal and the response signal of the multiple measurements.

In some embodiments, the test device obtains at least one test indicator value for the communication link under test based on the radio frequency signal and the response signal measured multiple times. That is, the test apparatus may calculate at least one test index value over a plurality of measurements via the test application. Optionally, the test index value includes, but is not limited to: throughput, packet loss rate, dropped call rate, connection interruption condition and the like, and the test index value can accurately reproduce the key scene characteristics of fading, co-channel interference, multi-frequency coverage and the like of the external field signal.

In some embodiments, the test device determines a channel quality of the communication link under test based on the at least one test indicator value. Optionally, the test device performs weighted summation on the at least one test index value to obtain the channel quality, each test index value may have a different weight coefficient, and the correspondence between the test index value and the weight coefficient may be preconfigured by a technician. Furthermore, according to the channel quality in the test result, the technician can locate the throughput problem of the product or service from various angles such as power, signal-to-noise ratio, signaling of the channel and the indoor base station, error rate tracking and the like, so as to optimize the performance of the terminal to be tested or the service application of the test.

Fig. 4 is a schematic structural diagram of a device for testing quality of a communication link according to an embodiment of the present application, please refer to fig. 4, wherein the device is used for testing channel quality of a communication link to be tested, which is accessed by a terminal to be tested, and the device includes:

A creating module 401, configured to create a virtual cellular network, where the virtual cellular network is used to convert the internet connected to the test device into a cellular network connected to the terminal to be tested;

A transmitting module 402, configured to transmit, to the terminal to be tested, a radio frequency signal generated for the terminal to be tested through the virtual cellular network, where the target site is used for shielding electromagnetic interference from outside;

A receiving module 403, configured to receive a response signal returned by the terminal to be tested through the virtual cellular network;

a determining module 404, configured to determine a channel quality of the communication link under test based on the radio frequency signal and the response signal measured multiple times.

According to the device provided by the embodiment of the application, the terminal to be tested is placed in the target place shielded from external electromagnetic interference, and the virtual cellular network is built by using the test equipment to simulate the signal environment of the real external field communication link to be tested, so that the test requirement of the real external field is simulated in the test scene, the test personnel is not required to take a fixed traffic line manually to realize the external field race test, the disturbance of some natural factors to the measurement process is shielded, and the stability and the test accuracy of the test index are relatively improved.

In some embodiments, the creation module 401 is to:

In some embodiments, a channel simulator is disposed in the virtual cellular network, the channel simulator being configured to simulate the communication link under test, and a power amplifier being configured to power amplify the radio frequency signal; the sending module 402 is configured to:

The sending module 402 is further configured to:

the sending module 402 is further configured to: transmitting the amplified signals to the terminal to be tested through the plurality of measuring antennas;

The receiving module 403 is further configured to: and receiving the response signals returned by the terminal to be tested through the plurality of communication antennas.

In some embodiments, the determination module 404 is to:

It should be noted that: the device for testing the quality of the communication link provided in the above embodiment only illustrates the division of the functional modules when testing the channel quality of the communication link, and in practical application, the above functional allocation can be completed by different functional modules according to needs, i.e. the internal structure of the testing device is divided into different functional modules to complete all or part of the functions described above. In addition, the device for testing the quality of the communication link provided in the foregoing embodiment belongs to the same concept as the embodiment of the method for testing the quality of the communication link, and the detailed implementation process of the device is shown in the embodiment of the method for testing the quality of the communication link, which is not described herein again.

Fig. 5 is a schematic structural diagram of a test apparatus according to an embodiment of the present application. Optionally, the device types of the test device 500 include: a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III, motion picture expert compression standard audio plane 3), an MP4 (Moving Picture Experts Group Audio Layer IV, motion picture expert compression standard audio plane 4) player, a notebook computer, or a desktop computer. The test device 500 may also be referred to by other names of user devices, portable terminals, laptop terminals, desktop terminals, etc.

In general, the test apparatus 500 includes: a processor 501 and a memory 502.

Optionally, processor 501 includes one or more processing cores, such as a 4-core processor, an 8-core processor, or the like. Optionally, the processor 501 is implemented in at least one hardware form of DSP (DIGITAL SIGNAL Processing), FPGA (Field-Programmable gate array), PLA (Programmable Logic Array ). In some embodiments, the processor 501 includes a main processor and a coprocessor, the main processor being a processor for processing data in an awake state, also referred to as a CPU (Central Processing Unit ); a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 501 is integrated with a GPU (Graphics Processing Unit, image processor) that is responsible for rendering and rendering of the content that the display screen is required to display. In some embodiments, the processor 501 also includes an AI (ARTIFICIAL INTELLIGENCE ) processor for processing computing operations related to machine learning.

In some embodiments, memory 502 includes one or more computer-readable storage media, which are optionally non-transitory. Memory 502 also optionally includes high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 502 is used to store at least one program code for execution by processor 501 to implement the quality testing method of a communication link provided by various embodiments of the present application.

In some embodiments, the test apparatus 500 may further optionally include: a peripheral interface 503 and at least one peripheral. The processor 501, memory 502, and peripheral interface 503 can be connected by a bus or signal line. The individual peripheral devices can be connected to the peripheral device interface 503 by buses, signal lines, or circuit boards. Specifically, the peripheral device includes: at least one of radio frequency circuitry 504, a display 505, a camera assembly 506, audio circuitry 507, and a power supply 508.

Peripheral interface 503 may be used to connect at least one Input/Output (I/O) related peripheral to processor 501 and memory 502. In some embodiments, processor 501, memory 502, and peripheral interface 503 are integrated on the same chip or circuit board; in some other embodiments, any one or both of the processor 501, memory 502, and peripheral interface 503 are implemented on separate chips or circuit boards, which is not limited in this embodiment.

The Radio Frequency circuit 504 is configured to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuitry 504 communicates with a communication network and other communication devices via electromagnetic signals. The radio frequency circuit 504 converts an electrical signal into an electromagnetic signal for transmission, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 504 includes: antenna systems, RF transceivers, one or more amplifiers, tuners, oscillators, digital signal processors, codec chipsets, subscriber identity module cards, and so forth. Optionally, the radio frequency circuitry 504 communicates with other test equipment via at least one wireless communication protocol. The wireless communication protocol includes, but is not limited to: metropolitan area networks, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and/or WiFi (WIRELESS FIDELITY ) networks. In some embodiments, the radio frequency circuit 504 further includes NFC (NEAR FIELD Communication) related circuits, which are not limited by the present application.

The display 505 is used to display a UI (User Interface). Optionally, the UI includes graphics, text, icons, video, and any combination thereof. When the display 505 is a touch display, the display 505 also has the ability to collect touch signals at or above the surface of the display 505. The touch signal can be input as a control signal to the processor 501 for processing. Optionally, the display 505 is also used to provide virtual buttons and/or virtual keyboards, also referred to as soft buttons and/or soft keyboards. In some embodiments, the display 505 is one, providing a front panel of the test device 500; in other embodiments, the display 505 is at least two, and is disposed on different surfaces of the test apparatus 500 or in a folded design; in some embodiments, the display 505 is a flexible display disposed on a curved surface or a folded surface of the test device 500. Even alternatively, the display 505 is arranged in a non-rectangular irregular pattern, i.e. a shaped screen. Optionally, the display screen 505 is made of materials such as an LCD (Liquid CRYSTAL DISPLAY), an OLED (Organic Light-Emitting Diode), and the like.

The camera assembly 506 is used to capture images or video. Optionally, the camera assembly 506 includes a front camera and a rear camera. Typically, the front camera is disposed on a front panel of the testing apparatus, and the rear camera is disposed on a rear surface of the testing apparatus. In some embodiments, the at least two rear cameras are any one of a main camera, a depth camera, a wide-angle camera and a tele camera, so as to realize that the main camera and the depth camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize a panoramic shooting and Virtual Reality (VR) shooting function or other fusion shooting functions. In some embodiments, camera assembly 506 also includes a flash. Alternatively, the flash is a single-color temperature flash, or a dual-color temperature flash. The dual-color temperature flash lamp refers to a combination of a warm light flash lamp and a cold light flash lamp, and is used for light compensation under different color temperatures.

In some embodiments, audio circuitry 507 includes a microphone and a speaker. The microphone is used for collecting sound waves of users and environments, converting the sound waves into electric signals, and inputting the electric signals to the processor 501 for processing, or inputting the electric signals to the radio frequency circuit 504 for voice communication. For purposes of stereo acquisition or noise reduction, a plurality of microphones are respectively disposed at different portions of the test apparatus 500. Optionally, the microphone is an array microphone or an omni-directional pickup microphone. The speaker is used to convert electrical signals from the processor 501 or the radio frequency circuit 504 into sound waves. Alternatively, the speaker is a conventional thin film speaker, or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, not only an electric signal but also an acoustic wave audible to humans can be converted into an acoustic wave inaudible to humans for ranging and other purposes. In some embodiments, audio circuit 507 also includes a headphone jack.

The power supply 508 is used to power the various components in the test apparatus 500. Alternatively, the power source 508 is alternating current, direct current, disposable or rechargeable. When the power supply 508 includes a rechargeable battery, the rechargeable battery supports wired or wireless charging. The rechargeable battery is also used to support fast charge technology.

In some embodiments, the test apparatus 500 further includes one or more sensors 510. The one or more sensors 510 include, but are not limited to: acceleration sensor 511, gyro sensor 512, pressure sensor 513, optical sensor 514, and proximity sensor 515.

In some embodiments, the acceleration sensor 511 detects the magnitude of acceleration on three coordinate axes of the coordinate system established with the test device 500. For example, the acceleration sensor 511 is configured to detect components of gravitational acceleration on three coordinate axes. Optionally, the processor 501 controls the display screen 505 to display a user interface in a lateral view or a longitudinal view according to the gravitational acceleration signal acquired by the acceleration sensor 511. The acceleration sensor 511 is also used for acquisition of motion data of a game or a user.

In some embodiments, the gyro sensor 512 detects the body direction and the rotation angle of the test apparatus 500, and the gyro sensor 512 and the acceleration sensor 511 cooperate to collect 3D actions of the user on the test apparatus 500. The processor 501 realizes the following functions according to the data collected by the gyro sensor 512: motion sensing (e.g., changing UI according to a tilting operation by a user), image stabilization at shooting, game control, and inertial navigation.

Optionally, a pressure sensor 513 is disposed on a side frame of the test apparatus 500 and/or below the display 505. When the pressure sensor 513 is disposed on the side frame of the test apparatus 500, a grip signal of the user on the test apparatus 500 can be detected, and the processor 501 performs left-right hand recognition or quick operation according to the grip signal collected by the pressure sensor 513. When the pressure sensor 513 is disposed at the lower layer of the display screen 505, the processor 501 controls the operability control on the UI interface according to the pressure operation of the user on the display screen 505. The operability controls include at least one of a button control, a scroll bar control, an icon control, and a menu control.

The optical sensor 514 is used to collect the ambient light intensity. In one embodiment, processor 501 controls the display brightness of display screen 505 based on the intensity of ambient light collected by optical sensor 514. Specifically, when the intensity of the ambient light is high, the display brightness of the display screen 505 is turned up; when the ambient light intensity is low, the display brightness of the display screen 505 is turned down. In another embodiment, the processor 501 also dynamically adjusts the shooting parameters of the camera assembly 506 based on the ambient light intensity collected by the optical sensor 514.

A proximity sensor 515, also referred to as a distance sensor, is typically provided on the front panel of the test apparatus 500. The proximity sensor 515 is used to capture the distance between the user and the front of the test device 500. In one embodiment, when the proximity sensor 515 detects a gradual decrease in the distance between the user and the front of the test device 500, the processor 501 controls the display 505 to switch from the bright screen state to the off screen state; when the proximity sensor 515 detects that the distance between the user and the front of the test device 500 gradually increases, the processor 501 controls the display 505 to switch from the off-screen state to the on-screen state.

Those skilled in the art will appreciate that the configuration shown in fig. 5 is not limiting of the test apparatus 500 and can include more or fewer components than shown, or certain components may be combined, or a different arrangement of components may be employed.

In an exemplary embodiment, a computer readable storage medium is also provided, for example a memory comprising at least one computer program executable by a processor in a test device to perform the method of quality testing of a communication link in the various embodiments described above. For example, the computer readable storage medium includes ROM (Read-Only Memory), RAM (Random-Access Memory), CD-ROM (Compact Disc Read-Only Memory), magnetic tape, floppy disk, optical data storage device, and the like.

In an exemplary embodiment, a computer program product is also provided, comprising one or more computer programs, the one or more computer programs stored in a computer readable storage medium. The one or more processors of the test device are capable of reading the one or more computer programs from the computer-readable storage medium, the one or more processors executing the one or more computer programs so that the test device is capable of executing to perform the quality testing method of the communication link in the above-described embodiments.

Those of ordinary skill in the art will appreciate that all or a portion of the steps implementing the above-described embodiments can be implemented by hardware, or can be implemented by a program instructing the relevant hardware, optionally stored in a computer readable storage medium, optionally a read-only memory, a magnetic disk or an optical disk, etc.

The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but rather, the application is to be construed as limited to the appended claims.

Claims

1. A method for testing the quality of a communication link, the method being performed by a testing device for testing the channel quality of a communication link to be tested to which a terminal to be tested is connected, the method comprising:

2. The method of claim 1, wherein the creating a virtual cellular network comprises:

3. The method according to claim 1, wherein a channel simulator is provided in the virtual cellular network, the channel simulator being configured to simulate the communication link under test, and a power amplifier being configured to power amplify the radio frequency signal;

4. A method according to claim 3, wherein a comprehensive tester and a radio frequency switch are further arranged in the virtual cellular network, the comprehensive tester is used for sending radio frequency signals and receiving response signals, and the radio frequency switch is used for switching communication links;

5. A method according to claim 3, wherein a plurality of measuring antennas and a plurality of communication antennas are arranged in the target site, the measuring antennas are used for transmitting downlink signals to the terminal to be tested, and the communication antennas are used for transmitting response signals to the test equipment;

6. A method according to claim 3, wherein said determining the channel quality of the communication link under test based on the radio frequency signal and the response signal of the plurality of measurements comprises:

7. The method of claim 6, wherein each output leg of the channel simulator is connected to a measurement antenna in the target site to control channel fading conditions of the communication link to be measured accessed to the terminal to be measured through the measurement antenna by the output legs.

8. The method of any one of claims 1 to 7, wherein the target site is an anechoic chamber or an all anechoic chamber.

9. A quality testing apparatus for a communication link, the apparatus being configured to test a channel quality of a communication link to be tested to which a terminal to be tested is connected, the apparatus comprising:

10. A test apparatus comprising one or more processors and one or more memories, the one or more memories having stored therein at least one computer program loaded and executed by the one or more processors to implement the quality testing method of a communication link as claimed in any of claims 1 to 8.

11. A computer readable storage medium, characterized in that at least one computer program is stored in the computer readable storage medium, which is loaded and executed by a processor to implement the quality testing method of a communication link according to any one of claims 1 to 8.

12. A computer program product, characterized in that the computer program product comprises at least one computer program that is loaded and executed by a processor to implement the quality testing method of a communication link according to any one of claims 1 to 8.