Product category:
Compliance Engineering
News Release from: Rohde and Schwarz | Subject: CRTU-W and CRTU-M
Edited by the Electronicstalk Editorial
Team on 19 January 2006
Software adds layer 1 testing
Layer 1 test software from Rohde and Schwarz provides a flexible test environment for layer 1 implementations in WCDMA and HSDPA user equipment.
Layer 1 test software from Rohde and Schwarz provides a flexible test environment for layer 1 implementations in WCDMA and HSDPA user equipment It offers numerous possible configurations for the transport channels defined in these standards
This article was originally published on Electronicstalk on 8 Sep 2004 at 8.00am (UK)
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An additional scripting interface facilitates the automated execution of test scenarios.
The software is available as an option for the R and S CRTU-W and CRTU-M platforms.
In accordance with the WCDMA standard, services with different quality requirements can be bundled on the same resources in the physical layer (layer 1); a different channel combination can be selected for each service.
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HSDPA adds to the list of tasks for layer 1.
Chipset manufacturers for WCDMA and HSDPA terminals must therefore thoroughly test the layer 1 implementation before it is integrated.
The test software simulates the layer 1 behaviour of a WCDMA basestation.
It can generate complex downlink signals at layer 1 and test their reception and processing in the layer 1 UE implementation under test.
In the uplink, the layer 1 test software analyses the signals received from the DUT.
Moreover, the software tests for correct interaction between the downlink and the upink in the DUT, which is indispensable in HSDPA tests.
The DUT is operated in nonsignalling mode, where no signalling by higher layers is required.
The test software verifies layer 1 functions such as compressed mode, closed loop power control and transmit diversity.
Above all, it provides numerous capabilities for configuring the transport channels defined in the WCDMA standard and then for creating different channel combinations.
In the physical layer, the HSDPA standard provides for two new channels in the downlink and one new channel in the uplink.
Owing to the layer 1 test software, these new channels are user-configurable; even HSDPA specifics such as adaptive modulation and hybrid ARQ protocol can be taken into account.
Thus, virtually any test scenario can be generated.
In addition to manual operation, the layer 1 test software supports a scripting interface based on the Microsoft COM standard, enabling regression tests.
Automated test scripts can be prepared in Visual Basic, for example, and predefined channels integrated into the scripts.
The test software allows a test scenario to be modified while the test is in progress, without the need for recompilation.
Configuring the Windows-based GUI and immediately activating parameter changes requires no special programming knowledge.
The layer 1 test software option for the R and S CRTU-W and CRTU-M is now available from Rohde and Schwarz.
Both these hardware platforms can be upgraded to fully configured protocol test environments, and so can be applied from layer 1 development and protocol integration through to conformance tests.
Plus, they are ready for high speed uplink packet access (HSUPA). Request a free brochure from Rohde and Schwarz ...
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