CN113395189B - Vehicle-mounted Ethernet SQI signal quality testing method and system - Google Patents
Vehicle-mounted Ethernet SQI signal quality testing method and system Download PDFInfo
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- CN113395189B CN113395189B CN202110739970.3A CN202110739970A CN113395189B CN 113395189 B CN113395189 B CN 113395189B CN 202110739970 A CN202110739970 A CN 202110739970A CN 113395189 B CN113395189 B CN 113395189B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/06—Generation of reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
Abstract
The invention discloses a method and a system for testing the quality of an SQI (sequence analysis) signal of a vehicle-mounted Ethernet, which relate to the vehicle-mounted Ethernet technology.A host computer control signal regulating plate outputs noise through a Gaussian noise generator to carry out fault injection on a tested Ethernet node in a crosstalk mode, regulates the voltage between each noise level to change and adjust the signal quality, controls a bus acquisition device or directly sends an instruction to the tested Ethernet node through an ADB (advanced digital bus) to acquire the SQI value fed back by the tested Ethernet node, and a host computer data analysis unit automatically tests and analyzes the SQI signal quality and generates a test report. The invention can quickly and accurately test the quality of the SQI signal of the vehicle-mounted Ethernet so as to ensure the reliable use of functions such as cloud application, remote diagnosis and the like of data.
Description
Technical Field
The invention belongs to the technical field of automobile detection, and particularly relates to an SQI signal quality automatic testing method based on a vehicle-mounted Ethernet.
Background
In a new network architecture, ethernet is used as a new network application. The cloud-on-data and remote-diagnosis big data transmission is realized through the Ethernet, the real-time performance and stability requirements of the vehicle-mounted Ethernet on signals are higher than those of the traditional industrial Ethernet, the Signal Quality Index (SQI) is used for expressing the communication quality of the vehicle-mounted Ethernet, and the quality of a current communication link can be judged and controlled through the read SQI. In the communication process of the controller, the PHY chip can monitor the SQI value in real time, and when the monitored SQI value is lower than a threshold value, the PHY chip can disconnect a communication link so as to ensure the communication reliability. The correctness of the SQI value directly affects the behavior of the communication link between the controllers, and thus the testing of the SQI value is very important and necessary.
Chinese invention patent CN110048910A discloses a vehicle-mounted Ethernet gateway test system and method. The system and the method for testing the vehicle-mounted Ethernet gateway are provided to solve the problems of complex operation and low testing efficiency of the Ethernet gateway testing process in the prior art. The method comprises the following steps: the system comprises a tested Ethernet gateway, an upper computer and a bus acquisition device connected between the tested Ethernet gateway and the upper computer; the upper computer is used for receiving a test instruction input by a user through a human-computer interaction interface and sending a test case corresponding to the test instruction to the bus acquisition device according to the test instruction; and the bus acquisition device is used for testing the Ethernet gateway to be tested according to the test case and outputting a test result. The application mainly discloses that a bus acquisition device tests an Ethernet gateway to be tested according to a test case and outputs a test result.
The existing vehicle-mounted Ethernet signal quality index SQI (used for characterizing Ethernet communication link quality) is obtained based on bus signal-to-noise ratio (SNR) conversion. The signal quality testing method mainly obtains the SQI value by manually manufacturing noise interference. The test has the problems of large workload, long test period, low test efficiency, inaccurate test result and the like. Therefore, it is necessary to invent an automatic test method for quality index of vehicle-mounted ethernet SQI signal to test, analyze and evaluate the quality index of vehicle-mounted ethernet SQI signal.
Disclosure of Invention
Aiming at the problem of noise interference in vehicle-mounted Ethernet signal quality index SQI measurement in the prior art, the invention provides an automatic test method based on the vehicle-mounted Ethernet SQI signal quality index, which can quickly and accurately test and verify the vehicle-mounted Ethernet SQI signal quality index so as to ensure the reliable use of functions such as cloud application, remote diagnosis and the like of data.
The technical scheme for solving the technical problems is that the upper computer controls the signal generator to send Gaussian noise amplitude through the adjusting plate, the noise level coupled to the communication link is changed by changing the Gaussian noise amplitude, the controller SQI is obtained based on the noise conversion of the communication link, the Gaussian noise amplitude of the signal generator is changed to change the SQI of the tested controller, the upper computer controls the bus acquisition device or directly sends an instruction to the tested Ethernet node through an Android Debug Bridge (ADB), the SQI value fed back by the tested Ethernet node is obtained, and the data analysis unit of the upper computer automatically tests and analyzes the SQI signal quality and generates a test report.
Further, the upper computer sends a CAN instruction to the tested Ethernet node through the bus acquisition device to acquire data containing an SQI value returned by the tested Ethernet node, the signal adjusting plate increases the noise level until the tested Ethernet node cannot establish connection, the data containing the SQI value is extracted to be analyzed, and a test report is generated.
Further, the upper computer directly sends an instruction to the Ethernet node to be tested through the ADB, an ADB command replied by the Ethernet node to be tested is obtained, a TXT file is generated according to the instruction sending and replying process, the upper computer stores the TXT file, the signal adjusting plate increases the noise level until the Ethernet node to be tested cannot be connected, the upper computer pulls the TXT file to the upper computer through the ADB command for analysis, effective characters in the TXT file are extracted, and a test report is generated through analysis.
The quality of the SQI signal analyzed by the upper computer specifically can be as follows: and extracting the SQI value and the Link state, judging whether the SQI value is 0 or not when the Link state has no intermittent Linkdown, if so, continuously extracting the SQI value and the Link state, if not, sending noises with different grades to the tested Ethernet node by a signal adjusting plate, extracting the corresponding SQI value for analysis, and if the SQI value is stable and monotonically decreased, passing the test.
The invention also provides an automatic SQI signal quality testing system based on the vehicle-mounted Ethernet, which comprises an upper computer, a signal regulating plate, a bus collecting device, a programmable program-controlled power supply and a tested Ethernet node, wherein the upper computer controls the signal regulating plate to adopt a Gaussian noise generator to output noise to carry out fault injection on the tested Ethernet node in a crosstalk mode, the signal regulating plate regulates the voltage of each noise level to change and regulate the signal quality, the upper computer controls the bus collecting device or directly sends an instruction to the tested Ethernet node through ADB to obtain an SQI value fed back by the tested Ethernet node, and an upper computer data analysis unit automatically tests and analyzes the SQI signal quality and generates a test report.
The invention can realize continuous automatic test for many times and can quickly test the quality of the SQI signal of the Ethernet. The SQI value can be automatically acquired, data can be stored, and the data can be automatically analyzed to obtain a test result and a problem point.
Drawings
FIG. 1 is an SQI signal quality automatic test system according to the present invention;
FIG. 2 is a schematic diagram of an automatic SQI signal quality testing process according to the present invention;
FIG. 3 is a schematic view of a test flow for obtaining the quality of the SQI signal of the Ethernet under test through the CAN command;
FIG. 4 is a schematic diagram of a test flow for obtaining the SQI signal quality of the Ethernet under test through ADB;
FIG. 5 is a diagram illustrating SQI values obtained by ADB;
FIG. 6 is a schematic diagram illustrating a data analysis system.
Detailed Description
The implementation of the present invention will be described in more detail below with reference to the accompanying drawings and specific examples. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Fig. 1 is an architecture diagram of a system for automated testing of SQI signal quality based on a vehicle-mounted ethernet according to the present invention. The system comprises an upper computer 101, a bus acquisition device 102, a signal conditioning board 104, a programmable power supply 105 and a tested Ethernet node 103. The upper computer designs an automatic test engineering script according to a case flow, the automatic test engineering script comprises control of automatic test and test result analysis, and the tested Ethernet node is connected with the upper computer through bus acquisition equipment or directly through a USB interface; the bus acquisition equipment sends and reads information of the tested Ethernet node in a CAN (controller area network) mode, the programmable power supply is powered on, the signal adjusting plate is connected with the tested Ethernet node, the Gaussian noise generator is adjusted to perform fault injection on the tested Ethernet node in a crosstalk mode, the voltage of each noise level is adjusted to adjust the signal quality, the upper computer controls the bus acquisition equipment or directly sends an instruction to the tested Ethernet node through an ADB (advanced data bus) to acquire an SQI (sequence analysis) value fed back by the tested Ethernet node, and the upper computer data analysis unit automatically tests and analyzes the SQI signal quality and generates a test report.
In order to realize the quality test of the vehicle-mounted Ethernet SQI signal, a method for testing the quality of the vehicle-mounted Ethernet SQI signal applied to the test system is also provided, and FIG. 2 is a flow chart of the automatic test method based on the vehicle-mounted Ethernet SQI signal quality. The method comprises the following steps:
And 2, the upper computer controls the signal generator to emit Gaussian noise amplitude through the adjusting plate, the noise level coupled to the communication link is changed by changing the simulated Gaussian noise amplitude, the SQI of the controller to be tested can be changed by changing the Gaussian noise amplitude of the signal generator based on the conversion of the communication link noise to obtain the SQI of the controller. The more noise, the worse the environment, and the smaller the SQI.
And 3, the upper computer obtains the response data of the Ethernet node to be tested in a CAN command mode or an ADB mode through the bus acquisition equipment, stores the response data into a data file, and prepares for extracting the noise amplitude, the SQI value and the Link state from the original data for data analysis.
And 4, importing the response data of the Ethernet node to be tested into the upper computer data analysis unit, and analyzing the data to generate a test result and a report. The noise amplitude increases, the worse the environment, the SQI decreases. Specifically, the data analysis system extracts the noise amplitude, the SQI value of the measured object and the Link state and generates a noise amplitude-SQI and SQI-Link state hyperbolic diagram. In one curve, the noise amplitude increases on the abscissa and the SQI value decreases on the ordinate, monotonically decreasing (and not passing if there is intermittent dip). The Link state corresponding to the SQI greater than 0 in the abscissa of the other curve is continuous Link. (if the linkdown does not pass) after the analysis is finished, the test results are collated to generate a test report.
In order to improve the test accuracy of the tested Ethernet node, the number of times of repeatedly reading the SQI value under the same noise is set by the upper computer, and the maximum value and the minimum value are obtained and used as basic data of subsequent analysis data.
As shown in fig. 3, a test flow for obtaining the quality of the tested ethernet SQI signal through the CAN command is illustrated, and the method is applicable to most tested objects. And man-made channel noise is removed before testing, so that the tested object and the testing environment can reach the highest signal quality.
And 3-1, powering up the SQI signal quality automatic test system.
And 3-2, the upper computer sends a CAN diagnosis message instruction for acquiring the SQI value of the tested object to the tested Ethernet node through the bus acquisition device, the tested object replies the CAN diagnosis message instruction containing the SQI value, the bus acquisition device acquires all message data and simultaneously monitors the Link state of the Ethernet Link, and all test data are stored by the upper computer.
3-3, in order to improve the test accuracy of the tested Ethernet node, the SQI value is repeatedly read for N times under the same noise set by the upper computer (taking 100 times of sampling at this time as an example).
And 3-4, adjusting a signal adjusting plate to increase signal noise, wherein the upper computer controls the signal generator to emit Gaussian noise amplitude through the adjusting plate, the noise level coupled to the communication link is changed by changing the simulated Gaussian noise amplitude, the SQI of the controller is obtained based on the communication link noise conversion, and the SQI of the controller to be tested can be changed by changing the Gaussian noise amplitude of the signal generator. The more noise, the worse the environment, the smaller the SQI, and the noise amplitude is recorded.
And 3-5, judging whether the Ethernet connection Linkup can be established with the object to be tested by the upper computer, wherein the connection can be established to 3-2, and the connection can not be established to 3-6.
And 3-6, analyzing the data, generating a test report, settling the problems, and finishing the automatic test, which is detailed in figure 6.
Fig. 4 is a schematic diagram of a test flow for acquiring the quality index of the SQI signal of the tested ethernet through the ADB, and this embodiment exemplifies the test flow for acquiring the quality of the SQI signal of the tested ethernet node through the ADB. The ADB is fully called an Android Debug bridge of Android Debug bridge and is suitable for the tested object of the Android system.
The artificial channel noise is removed before the test, and the tested object and the test environment can reach the highest signal quality. The method mainly comprises the following steps:
4-1, the SQI signal quality automatic test system is powered on.
And 4-2, the upper computer sends an ADB instruction to the tested Ethernet node to obtain an SQI value, the tested object replies the ADB instruction containing the SQI value, the bus acquires and monitors the Link state of the Ethernet Link, and all test data are stored by the upper computer.
4-3, in order to improve the test accuracy of the tested Ethernet node, the SQI value is repeatedly read for N times under the same noise set by the upper computer.
And 4, generating a TXT file by the ADB interaction data of the object to be tested, and storing the TXT file in a local storage space for being pulled by an upper computer.
And 4-5, adjusting a signal adjusting plate to increase signal noise, wherein the upper computer controls the signal generator to emit Gaussian noise amplitude through the adjusting plate, the noise level coupled to the communication link is changed by changing the simulated Gaussian noise amplitude, the controller SQI is obtained based on the communication link noise conversion, and the measured controller SQI can be changed by changing the Gaussian noise amplitude of the signal generator, and the noise amplitude is recorded.
And 4-6, the upper computer sends an ADB instruction to pull the TXT test data file of the tested object.
And 4-7, judging whether the Ethernet connection Linkup can be established with the tested Ethernet node by the upper computer, wherein if the Ethernet connection Linkup can be established, the connection is 4-2, and the connection cannot be established to 4-8.
4-8, analyzing data, generating a test report, clearing up problems, and finishing the automatic test, which is detailed in figure 6.
FIG. 5 shows a flow chart for obtaining SQI values through ADB.
And 5-1, the upper computer sends an ADB instruction to the Ethernet node to be tested to obtain an SQI value.
5-2. The tested object replies the ADB command containing the SQI value.
And 5-3, the tested object generates an ADB interactive data into a TXT file to be stored in a local storage space for being pulled by a following upper computer.
And 5-4, the upper computer sends an ADB instruction to pull the TXT test data file of the tested object.
And 5-5, extracting effective characters in the TXT file by the upper computer, and acquiring SQI data for the upper computer to use.
Fig. 6 is a schematic diagram illustrating a data analysis system.
6-1, leading in test data by the upper computer, and extracting data of the noise amplitude, the SQI value and the Link state.
And 6-2, importing the SQI data by the upper computer, and extracting the maximum value and the minimum value from the data tested repeatedly for N times (N is the preset adoption times) under the same noise.
And 6-3, processing the extracted data by the upper computer to generate a hyperbolic curve chart of the noise amplitude-SQI and SQI-Link state hyperbola.
6-4, if the noise amplitude of the abscissa in one curve is increased progressively, the SQI value of the ordinate is decreased progressively and monotonically decreased, and the Link state corresponding to the SQI value of the abscissa in the other curve being greater than 0 is continuous linking, judging that the test is passed, and arranging the test result by the upper computer to generate a test report.
6-5, if the noise amplitude of the abscissa in one curve is increased progressively, the SQI of the ordinate is increased intermittently, or a gap LinkDown is formed in the corresponding Link state of the SQI of the abscissa in the other curve, the SQI of the abscissa is larger than 0, the SQI of the ordinate does not pass the test, and the upper computer sorts the test results to generate a test report.
Claims (2)
1. A vehicle-mounted Ethernet SQI signal quality automatic test method is characterized in that an upper computer control signal adjusting plate injects faults into an Ethernet node to be tested in a crosstalk mode through noise output by a Gaussian noise generator, the voltage between each noise level is adjusted to change and adjust the signal quality, the upper computer controls a bus acquisition device or directly sends an instruction to the Ethernet node to be tested through an ADB control signal to obtain an SQI value fed back by the Ethernet node to be tested, and an upper computer data analysis unit automatically tests and analyzes the SQI signal quality and generates a test report;
the method comprises the steps that voltage between noise levels is adjusted to change and adjust signal quality, specifically, a signal adjusting plate is adjusted to increase signal noise, an upper computer controls a signal generator to emit Gaussian noise amplitude through the adjusting plate, the noise level coupled to a communication link is changed by changing simulated Gaussian noise amplitude, a controller SQI is obtained based on communication link noise conversion, the measured controller SQI can be changed by changing the amplitude of the Gaussian noise of the signal generator, and the noise amplitude is recorded;
the quality of the SQI signals analyzed by the upper computer is specifically as follows: extracting an SQI value and a Link state, judging whether the SQI value is 0 or not when the Link state has no intermittent Linkdown, if so, continuously extracting the SQI value and the Link state, if not, sending noises with different grades to a tested Ethernet node by a signal adjusting plate, extracting a corresponding SQI value for analysis, and if the SQI value is stable and monotonically decreased, passing the test;
the upper computer sends a CAN command to the tested Ethernet node through the bus acquisition device to acquire data containing an SQI value returned by the tested Ethernet node, the signal adjusting plate increases the noise level until the tested Ethernet node cannot establish connection, the data containing the SQI value is extracted for analysis, and a test report is generated; or the upper computer directly sends an instruction to the Ethernet node to be tested through the ADB, an ADB command replied by the Ethernet node to be tested is obtained, a TXT file is generated according to the instruction sending and replying process, the upper computer stores the TXT file, the noise level of the signal adjusting plate is increased until the Ethernet node to be tested cannot be connected, the upper computer pulls the TXT file to the upper computer through the ADB command to analyze, effective characters in the TXT file are extracted, and a test report is analyzed and generated.
2. An automatic test system for SQI signal quality based on a vehicle-mounted Ethernet is characterized by comprising an upper computer, a signal regulating plate, a bus collecting device, a programmable power supply and tested Ethernet nodes, wherein the upper computer controls the signal regulating plate to adopt a Gaussian noise generator to output noise to carry out fault injection on the tested Ethernet nodes in a crosstalk mode, the signal regulating plate regulates the voltage of each noise level so as to change and regulate the signal quality, the upper computer controls bus collecting equipment or directly sends an instruction to the tested Ethernet nodes through an ADB (advanced digital bus) to obtain SQI values fed back by the tested Ethernet nodes, and an upper computer data analysis unit automatically tests and analyzes the SQI signal quality and generates a test report;
the method comprises the steps that voltage between every two noise levels is adjusted to change and adjust signal quality, specifically, a signal adjusting plate is adjusted to increase signal noise, an upper computer controls a signal generator to emit Gaussian noise amplitude through the adjusting plate, the noise level coupled to a communication link is changed by changing the simulated Gaussian noise amplitude, a controller SQI is obtained based on communication link noise conversion, the controller SQI to be tested can be changed by changing the Gaussian noise amplitude of the signal generator, and the noise amplitude is recorded;
the quality of the SQI signals analyzed by the upper computer is specifically as follows: extracting an SQI value and a Link state, judging whether the SQI value is 0 or not when the Link state has no intermittent Linkdown, if so, continuously extracting the SQI value and the Link state, if not, sending noises with different grades to a tested Ethernet node by a signal adjusting plate, extracting a corresponding SQI value for analysis, and if the SQI value is stable and monotonically decreased, passing the test;
the upper computer sends a CAN command to the tested Ethernet node through the bus acquisition device to acquire data containing an SQI value returned by the tested Ethernet node, the signal adjusting plate increases the noise level until the tested Ethernet node cannot establish connection, the data containing the SQI value is extracted for analysis, and a test report is generated; or the upper computer directly sends an instruction to the Ethernet node to be tested through the ADB, an ADB command replied by the Ethernet node to be tested is obtained, a TXT file is generated according to the instruction sending and replying process, the upper computer stores the TXT file, the noise level of the signal adjusting plate is increased until the Ethernet node to be tested cannot be connected, the upper computer pulls the TXT file to the upper computer through the ADB command to analyze, effective characters in the TXT file are extracted, and a test report is analyzed and generated.
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| CN115134280B (en) * | 2022-06-23 | 2023-11-24 | 安徽江淮汽车集团股份有限公司 | Fault testing system and method for vehicle-mounted Ethernet |
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