Test of TD-SCDMA Access Network Interface

TD-SCDMA access network has a lot worth learning, here we mainly introduce TD-SCDMA Access Network Interface Test. The reported performance data and initialization information of Node B are all in XML format, you can analyze whether the execution process of Node B OM meets the requirement definition by reporting data files and SNMP Trap messages on the FTP server.

To test the LMT-B access network interface of the TD-SCDMA, the Node B om simulation tool is required to simulate the maintenance and management support function of Node B equipment. The relationship between LMT-B and Node B is between Manager and Agent. Some companies, such as AdventNet, have also developed general Agent simulators. However, local maintenance and management systems are not strictly standardized at home or abroad (in fact, even if there are standards, different equipment developers may have different understandings ), these Agent simulation tools do not meet the test requirements well and need to develop the Node B om Simulator Based on the features of Node B. The development of Node B OM simulators is not costly. You can use open-source SNMP ++ and AGENT ++ Development Kits. These two Development kits provide good SNMP support. We can also use the AgentPro tool to compile MIB in the form of ASN.1 into MIB framework files in the form of C ++ (. CPP and. H files ). In this way, the software framework of Node B OM simulator with SNMP support is completed, and the rest is how to make it respond to Get and Set operations and send Trap information.

By calling the external interfaces provided by AGENT ++, a friendly visual interface (UI) can be developed for the Node B OM simulator ). Any configuration and modification operations of the LMT-B can be intuitively reflected to the UI of Node B OM simulator, so that testers can judge the correctness of the LMT-B operation. We can also set and modify the value in the MIB through the UI to simulate the Node B parameter changes, to determine whether the LMT-B can reflect the actual work and running status of the current Node B. The Node B om simulator shields the complex processing process of maintenance information by the actual Node B OM, making the test operation of LMT-B access network interface of TD-SCDMA easier and easier. Take the test of the fault management function as an example. You only need to encapsulate and report the information according to the format requirements of the Trap PDU. Not only can manually send a single alarm to determine the LMT-B to handle the alarm information, you can also choose to automatically send a large number of alarm information, to simulate the occurrence of an alarm storm on Node B, and test the load processing capability of the LMT-B system. In addition, some situations that do not often occur in the actual environment, such as board temperature alarms and fan fault alarms, can also be simulated using the Node B OM simulator, easy to fully verify the LMT-B local network management system.

For example, Node B performance data reporting and System Test Result reporting simulation can be achieved using a data template. The Node B OM simulator only needs to apply these data templates to generate XML files that meet the requirements, upload them to the FTP server of the LMT-B, and send the appropriate Trap message. The tester tests the LMT-B's processing of various data by modifying the data template.

After the above two testing processes, we can find and solve most of the Software defects of LMT-B and Node B OM module. Facts also prove this, when the above two steps, the LMT-B Local Network Management System and Node B device docking, you can see: LMT-B successfully found Node B device, the various operations on the LMT-B can basically be delivered to the Node B device, and most of the test cases can pass the test. This also proves the feasibility of the Interface Test Scheme from the aspect.

Conclusion

The Interface Test Method of Network Maintenance Management System is diverse and varied, but the Interface Test Strategy of Local Network Management System of TD-SCDMA access network in this paper is general, it can be used to test interfaces of other maintenance and management systems, and provides a way of thinking for test engineers and testers to test interfaces of the network management system.