deploying and managing ip over wdm networks - Index of

102 Deploying and Managing IP over WDM Networks
6.3.2 Nonfunctional Requirements
The most important nonfunctional requirements are the following:
• The WINMAN design and implementation shall be based on specific
standards, so as to be able to interoperate with other systems over welldefined
interfaces.
• The WINMAN solution should be tested in real conditions before
being put into operation.
Interactions between WINMAN components shall be minimized in order
to minimize the bandwidth required by the system.
6.4 WINMAN UCs
After the requirements capture, the next step in defining the system’s architecture
consists of the identification and description of appropriate UCs that illustrate
the basic functionality of the target system. The architecture can only be
fully defined when the MSCs and class diagrams are defined. Appropriate terminology
has been used for building the UCs. Relevant references include (but are
not limited to) [2–6].
6.4.1 Identification and Classification of UCs
Table 6.1 depicts the names and allocation of UCs into appropriate categories.
The horizontal classification of UCs relates to the functional grouping of UCs
and is compliant to [1] in terms of the terminology used. However, the policies
provision and scheduler groups of UCs are WINMAN specific. The vertical
classification of UCs is according to the level of abstraction and related context
and modularity of the UCs.
An identifier is allocated to each UC (in parenthesis). The scheme adopted
is XYZ, where X denotes the horizontal classification (functional grouping), Y
denotes the vertical classification (level), and Z is a sequential number.
6.4.2 UCs Overview
This section presents an overview of all identified UCs. Critical aspects regarding
their context are briefly discussed, while UCs interrelations are depicted in
UML diagrams, according to the previous classification. Due to the nature of
interactions, some UCs appears in multiple diagrams. A short description of the
goal and context of each UC is also provided.