The automatic road test platform is a key project of the “three platforms and four systems†proposed by China Mobile, and is also a major breakthrough in the existing manual test technology. Through the construction of the automatic road test platform, it is possible to refine the evaluation and analysis of the quality of the wireless network, realize the 24-hour uninterrupted quality monitoring of the wireless network, greatly improve the efficiency of the road test, and reduce the cost of the road test by more than 70%. It solves the problem of large investment and high complexity of road test work, and provides a reliable and massive data source for network optimization work.
SPAN ADT is the first automatic TD-SCDMA network road test system independently developed by Datang Mobile. It can realize automatic acquisition and storage of TD-SCDMA network drive test data, which can be applied to network quality monitoring of TD-SCDMA wireless network. , optimization effect evaluation, cutover inspection and routine maintenance provide network optimization engineers with more powerful driving test methods.
SPAN ADT revolutionized the concept of traditional road test, unattended, remote control, minimizing the labor cost of road test; real-time data uploading, centralized management; terminal unified management, real-time monitoring, strategizing, reducing duplication test.
In the tender for China Mobile's 2G/3G automatic road test front-end equipment, Datang Mobile's self-developed automatic road test front-end equipment (SPAN ADT1.0) achieved the first place in technology with excellent product performance.
SPAN ADT automatic road test system introduction
ADT (front-end data acquisition subsystem) consists of on-board automatic road test terminal, automatic road test web monitoring system (including web browser and web server), and FTP server to complete data collection, uploading and storage (including web server and FTP server). Can be configured to the same server) to complete data acquisition, rendering and automatic analysis.
The overall structure of the system is shown below:
Figure 1: Overall system structure
SPAN ADT automatic drive test terminal function
The automatic road test terminal can collect test data according to instructions issued by the automatic road test web monitoring system, and receive and execute automatic road test web monitoring, when the communication connection between the automatic road test web monitoring system and the FTP server is correctly established. Various remote control commands issued by the system, and upload the collected test data to the correct folder in the FTP server.
Figure 2: SPAN ADT automatic road test terminal
Powerful multi-module test support
Internal support up to 8 slots, maximum support for 8 test modules for testing, can carry out simultaneous comparison test of China Mobile, China Unicom and China Telecom
High system configuration and high performance ensure multi-module testing capability
Flexible slot test module
The interface is unified and extensible. Each test module uses a unified interface to communicate with the device board. On a unified interface, you can freely expand various standard test cards (such as GSM, TD, WCDMA, CDMA2000) without making any modifications to the device board to reduce upgrade costs.
Unified interface allows test modules to be combined, replaced, and configured flexibly
There is no limit to the number of test modules and test positions of different standards.
System related software also provides corresponding flexibility support
Highly integrated test module
The components that are closely related to the core chip format of the test module (such as the antenna interface, SIM card socket, etc.) and the core chip are designed on one test module, and are replaced together with the deployment to facilitate the combination and replacement of the test modules.
After the antenna interface and SIM card socket are integrated into the test module, the interface between the test module and the device motherboard is simpler and more simple, and the system architecture is more reasonable and more scalable.
Easy to maintain: If there is a problem with a test module, the overall replacement and maintenance are more convenient
Rich and varied automatic test function
Support multi-time test mode, perform different tests at different time periods; support test plan cancellation/recovery control
Powerful test script: support to control multiple test modules and external devices concurrent test; support control each test module to do CS + PS concurrent business test; support loop, wait and other advanced test script control
Flexible exception handling mechanism: test module execution can be automatically resumed after the test module is disconnected
Complete and accurate data collection
Record Log in real time, and have exception handling such as power failure protection
Supports multiple log file upload methods such as timed upload, idle time upload, and real-time upload.
Transfer data using FTP. After the log file upload fails, there is a retry mechanism to support breakpoint retransmission to ensure the integrity of data transmission.
Support built-in large-capacity memory, can save, avoid log files are lost due to not being able to upload in time
Support for extracting log files in the field through the USB port
Good hardware stability design
The built-in battery can provide up to 2 hours of power supply independently, and the external power supply and built-in battery power supply can be continuously converted to ensure continuous testing.
The vehicle terminal has a wide operating temperature range of -20°C to +75°C, supporting various harsh environments such as low temperature and high temperature.
The external structure of the equipment is tight, fully dust-proof and rain-proof; the structure is stable and fully earthquake-resistant
The terminal hardware internally records the total boot time and the number of boot times, which are used to characterize the stability status of the device.
Main advantage
Datang Mobile's continuous technological innovation and rich network optimization experience make the optimization tools more competitive, and evolve with the network technology, always grasp the pulse of the industry and lead the change. In order to better establish a new mobile Internet world, we aim to help operators improve their wireless networks in the future. The solution provided by Datang Mobile Automated Drive Test System can help operators maximize network quality, improve network performance, increase profit opportunities and reduce customer churn, and achieve maximum recovery of network investment.
The main advantages of SPAN ADT are as follows:
Figure 3: Comparison of SPAN ADT test and traditional test method
Remote control, automatic, unattended, automatic dial test to ensure data reliability;
By deploying on a variety of transportation tools such as taxis, buses, and engineering test vehicles, the randomness of the route is fully guaranteed, and the problem can be fully exposed;
Can replace the road test engineer to carry out repeated, a large number of active tests to reduce manpower input;
Support automatic switch function setting, fully automatic and unattended.
Support automatic copying of test data, which is convenient for users to extract data at any time.
Support automatic remote test terminal software upgrade, reducing maintenance costs.
It can be automatically uploaded by the optimization engineer through timed upload, idle time upload, real-time upload and other automatic uploading methods for centralized management.
Simulate the user experience for testing, and be able to perform automatic testing of various services such as WWW, EMAIL, SMS, MMS, and VP, and test from the perspective of user experience;
Up to 14 test modules can be expanded to support multiple test cards (GSM/TD/WCDMA/CDMA2000).
Support USB, network card, VGA, serial port, PS/2 and other interfaces, can support a variety of test equipment such as extended UE, MOS, sweeper.
to sum up
SPAN ADT is the trend of future network optimization evaluation test. The automatic road test system can not only effectively reduce the cost of manual testing, but also put all the engineers' energy into the analysis of network problems, thus steadily improving the network quality. For operators, Double harvest of network quality improvement and test cost reduction
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