The UMTS Test Case
The UMTS test case is provided with the UMTS application and can be added to the GPRS application with the Gb/IP Support feature.
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In the UMTS application, the basic capability allows you to test a 3G-SGSN and a GGSN in a UMTS network. With the Gb/IP Support feature, you can test a 2G-SGSN and a GGSN in a GSM network and perform 2G/3G mobility.
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In the GPRS application, the basic capability of the Gb/IP Support feature allows you to test a 2G-SGSN and a GGSN in a GSM network.
The test system emulates the mobile nodes (MN) from the aspect of creating unique identifiers for each mobile subscriber and associated primary PDP and secondary contexts, and emulates the 2G or 3G RAN that services the MNs. The RAN elements generate traffic towards the SGSN, and listen for and respond to traffic from the SGSN.
With the end-to-end UMTS configuration, you can test a 3G-SGSN's Iu-PS interface and a GGSN's Gi interface. Both SS7-based (shown below) and IP-based protocol stacks are supported on the Iu-PS interface. See About SGSN Testing for more information.
The test case can also be used in a nodal configuration. In a UMTS scenario, the test system simulates the GGSN and the Iu-PS and Gn interfaces of the 3G-SGSN are tested.
In the end-to-end GSM configuration, the test case tests a 2G-SGSN's Gb interface and a GGSN's Gi interface.
In the nodal GSM configuration, the 2G-SGSN's Gb and Gn interfaces are tested.
With this test case, you define:
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The network environment, including an optional GGSN node
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The RNC or BSS links, MN, and PDP context volume and rates, and an optional rate distribution model
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The types of connections established: GMM attaches only or GMM attaches and PDP contexts
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Transport, radio, and control protocol attributes and behaviors
Measurements collected for this test case include:
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Counters that record the number and types of messages sent and received
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Average response times for the different types of messages received from an SUT
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Errors encountered during the test
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RNC or BSS link, GMM attach, and PDP context state and rates
Test Options
When your test activity measures processing capability rather than rates, you can expand the scope of the test:
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Add Data Traffic to the test to more closely simulate a live network using various wireless applications and protocols.
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Encrypt Data Traffic with the optional Dynamic IPSec feature.
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Generate G-CDRs with the optional SGSN Billing Support feature. If you also purchased the CGF Emulation feature, you can validate the contents of S-CDRs.
Measurements
Measurements collected for the basic test case are reported on the following tabs:
Additional measurements may be available depending on the test activity and options executed with the test case.