From Requirements to Scenarios through Specifications:
A Translation Procedure from Use Case Maps to LOTOS

Ruoshan Guan

Thesis submitted to the
Faculty of Graduate and Postdoctoral Studies
in partial fulfillment of 
the requirements for the degree of
Master of Computer Science

Under the auspices of the
Ottawa-Carleton Institute for Computer Science
University of Ottawa

Ottawa, Ontario, Canada
September 2002

© Ruoshan Guan, Ottawa, Canada, 2002


Abstract

The precise specification of communication systems is a crucial part of
their successful development and implementation. Different methodologies
for generating high-level formal specifications from informal requirements
have been used by researchers and industrial groups. This thesis proposes
an automatic approach, which is used for the early stages of the design
of communication systems.

In the first part of the thesis, we describe our automatic approach,
which is based on Use Case Maps for the capture and design of the
requirements and on LOTOS for simulation and validation.

In the second part of the thesis, we discuss the design of
two tools for our automatic approach. Ucm2LotosSpec is a tool
that supports the automatic translation from UCMs to LOTOS
specifications. Ucm2LotosScenarios is a tool that generates LOTOS
scenarios from UCMs.

Finally, our proposed approach is applied to a case study of the Location
Based Service in the Wireless Intelligent Network, a standard that was
under development when this work was done. Stage 2 scenarios for this
standard are obtained from informal requirements represented by Use
Case Maps. It is concluded that our approach is feasible, based on this
experience carried out on a realistic example.