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The Design and Implementation of Encoder/Decoder in TTCN-3 Testing Platform

Author: ChenHaiHong
Tutor: WangJunYi
School: Inner Mongolia University
Course: Applied Computer Technology
Keywords: TTCN-3 ASN.1 BER CER DER PER
CLC: TN762
Type: Master's thesis
Year: 2005
Downloads: 130
Quote: 2
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Abstract


TTCN (Tree and Tabular Combined Notation) standard ETSI, ITU-T, ISO and other international organizations to develop in the 1990s for protocol conformance testing . It has developed to the third edition ( TTCN -3 ) , TTCN -3 test description language is a new , more powerful , a broader range of applications , and is no longer limited to conformance testing . TTCN-3 compiler system TTCN-3 abstract test suite compiled into executable test suite , then TTCN-3 test platform to achieve test . TTCN-3 test platform architecture is very different with the past, the main test of the consistency test platform . TTCN-3 compiler system and test execution platform in China is still blank . TTCN-3 test execution platform is a distributed test system composed of multiple subsystems work together . Wherein the encoder / decoder in order to achieve communication with the system under test is designed . Must be able to understand each other in order to test the system and the system under test , a standard syntax has nothing to do with the specific network environment . ASN.1 is developed by ITU-T , in full compliance with this requirement . This article describes the design ideas of the encoder / decoder of TTCN-3 test execution platform ; ASN.1 codec standard , a full analysis , design TTCN-3 atom type , structure type encoding algorithm and decoding algorithm ; in WindowsXP four encoding / decoding / VC6.0 environment , and the methods they use to carry out a comparative analysis .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Modulation technique and the modulator,demodulator and the demodulator > Encoder
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