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MOBILE COMMUNICATIONS MEASURING INSTRUMENTS

ATS ManagerLogger and Results Database The logger captures data from the majority of components in the sys- tem and stores it in the results database. This data is used by the protocol analyzer to create message sequence charts and display decoded messages. The ATS Manager provides a user interface that allows configurationof the MX785201A PTS, launch of the test sequencer tool to select and execute pre-prepared Layer 3 and Layer 2 Test Procedures and browsing of the results from executing the Test Procedures using the Protocol Analyzer. National Instruments TestStand™ The MX785201A PTS uses the National Instruments TestStand™run-time engine as a high level sequencing tool. The TestStand™develop-mentsystem is used to create test sequences. Protocol Analyzer All Layer 3, Layer 2 and Layer 1 message exchanges between the MX785201A PTS and the System Under Test are logged. These messages are decoded to show the name and content of each field and displayed using the Protocol Analyzer. Raw captured data is displayed in hexadecimal format. Terminal Equipment (TE) Layer 1 RLC and MAC The TE is an optional software component available as part of the MD8480 in the MX785201A PTS. It supports a number of features including voice AMR 12.2K Codec, ISDN, IP and PPP. The MX785201A PTS provides a physical Layer 1 through the MD8480 that can communicate with a terminal. RLC and MAC layers conforming to the 3GPP specifications TS25.322 Radio Link Control Protocol Specification and TS25.321 Medium Access Control Specification are supplied as part of MD8480. Developer Library Codec Thin RRC SUT Control Application The Developer Library provides a proven set of TTCN test scripts that have been tested on real terminals and complements the Integration Library. These test cases provide a more flexible test capability and allow experienced designers to exercise their terminals beyond the requirements of 3GPP. This library is supplied in source code form. The ETS is supported by a codec capable of encoding and decoding Radio Resource Control (RRC), Non Access Stratum (NAS) and low- er layer configuration data. A thin RRC is provided to load NAS messages into RRC direct trans- fer messages and unload NAS messages from RRC direct transfer messages transparently. The MX785201A PTS framework provides an API to support test au- tomation using standard AT Commands and an MMI interface to au- tomatically control the UE. C-API As an alternative language to develop Layer 3 and Layer 2 Test Procedures, a 'C' based Application Programmer's Interface (C-API) is included in the form of a DLL. Executable Test Suite Layer 3 and Layer 2 test cases are implemented using TTCN (Tree and Tabular Combined Notation). Created TTCN tests are compiled to an Executable Test Suite (ETS) which interfaces to the MX785201A PTS via the GCI Management Interface and the GCI Operational Interface. These provide an open, standardized interface to TTCN based executable test suites. The MX785201A PTS has been de- veloped to work with the Telelogic Tau TTCN Test Suite. The GCI framework provided by the MX785201A PTS provides sup- port for a number of Test Suite Operations (TSOs) and also Protocol Implementation Conformance Statement (PICS/PIXIT).

Test Libraries

The Integration Library provides a proven set of TTCN test scripts that have been tested on real terminals. These test cases take the user through specific milestones (e.g., RRC connection, location update, voice call, etc.) and provide a straightforward method for testing of terminals during the integration process. They provide a step by step test approach to prove functionality in a UE. The Test Procedures are 3GPP compliant and are designed to be customized to the particular needs of an Integration Environment. The PTS Integration Library provides TTCN test cases in both exe- cutable and source code form, allowing the more experienced user to make changes to the parameters in order to test more specific de- tails of the terminal design. Integration Library http://www.anritsu.com 286