SWR Use Case Modeling

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SWR Use Case Modeling
Francis Bordeleau (Mercury Computer
Systems/Carleton University) Francois-Xavier
Lebas (Thales)
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Usage of Statecharts and Sequence Diagram at the
Use Case level

• Use statecharts at the use case level to give a
  high-level global overview of system behavior
• Use sequence diagrams to give an user-system
  interaction-based view of a use case
• Relationships between use case and statechart is
  many-to-one
• Relationship between use case and sequence
  diagram is one-to-many (potentially one sequence
  diagram for each possible scenario in a use case)
• Refinement between system level statechart and
  component statechart must be consistent
• Refinement between use case (black-box) level SD
  and white-box SD must be consistent, and must be
  consistent with class definitions

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Top level Use Case Packages

• Current SWRadio spec includes
• Radio System Functionality
• Radio Set Functionality
• HF4285 Military Waveform Example
• In the new version of the SWRadio specification,
  they will constitute three different packages
• Relationships between the three packages will be
  explicit
• Radio System Package describes the global use
  cases/scenarios of a SWRadio system
• Radio Set Package describes the main use
  cases/scenarios of a radio set. This is the main
  focus of the current specification
• HF4285 Military Waveform is used as an example to
  illustrate and validate the general SWRadio use
  cases and scenarios described in the Radio Set
  and Radio System Packages
• We propose to promote the first two packages
  (Radio System Package and Radio Set Package) to
  the main part of the document and put the HF4285
  Military Waveform in an appendix.

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Main Radio System Main Use Cases

• Purpose
• Clarify end-users needs
• Delineates what is addressed at lower levels
• Proposed Use Cases
• Operational Use
• System Management
• Configure
• Deploy
• Diagnose

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Radio Set Main Actors

• Give an overall actor diagram that describes the
  relationships between the main system actors
• Define the main actors using a template that
  provides
• Actor description
• List of system functionalities (use cases) in
  which the actor is involved
• For each functionality, the role of the actor in
  the system execution of that functionality

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Radio Set Sub-Packages

• Operational
• Control
• Startup
• Shutdown
• Configure
• Replace Unit
• Maintenance
• Log related use cases
• Support
• Security?
• Security and Manage Security?

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Main Radio Set Operational Use Cases

• Reception (Rx)
• Transmission (Tx)
• Configure
• Configure Software
• Configure Radio Set
• Download
• Different types of download?

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RX Use Case Description
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TX Use Case Description
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Channel Configuration