Description of Wireless Intelligent Network Services with Use Case Maps

Daniel Amyot and Rossana Andrade

TSERG, School of Information Technology and Engineering, University of Ottawa
150 Louis Pasteur, Ottawa, Ontario, K1N 6N5, Canada
E-mail: {damyot | randrade}@site.uottawa.ca

Abstract.

Increasing complexity in telecommunications services requires ever more
complex standards, and therefore the need for better means to write them
Over the years, scenario-driven approaches have been introduced in order
to describe functional aspects of systems at several levels of abstraction.
Their application to early stages of design and standardization processes
raises new hopes in editing concise, descriptive, maintainable, and
consistent documents that need to be understood by a variety of readers.
In this context, this paper investigates a recent visual notation for
causal scenarios called Use Case Maps. The goal is to better describe
distributed systems and telecommunication standards, and to fill the gap
between the stage where services are described informally and the stage
where message sequence information is generated. As an example, this paper
focuses on the Incoming Call Screening service of the new Wireless
Intelligent Network standard.