Conformance testing of ATM adaptation layer protocol

This paper presents an appropriate testing methodology to check the conformity of an implementation following ATM Adaptation Layer protocol in ATM/B-ISDN communication systems. In this paper, we analyze restrictions of the AAL Type 5 protocol to develop Abstract Test Suites and a test system, and we compare test coverage of applicable test methods to choose the best test method for AAL Type 5 Common Part protocol testing. We decide to apply Distributed Test Method for testing of the protocol because of its larger test coverage. To synchronize the execution of test cases between Upper Tester and Lower Tester in distributed testing environment, we propose a simple and efficient timing synchronization mechanism. To illustrate the effectiveness of our test structure, we give an example of test cases described in Tree and Tabular Combined Notation using the proposed timing synchronization mechanism.