Webel Radio Net: Focus BDD of the 'InitSession' scheduling Signal and its special role in a net session

Gallery
Tutorial
[TRAIL] SysMLv1: The Webel Radio Net port-based messaging example model in Cameo Systems Modeler and Cameo Simulation Toolkit
Section
Webel Radio Net: Model overview, exchange items, and Ports
Topic level
BASIC
UML keywords
Signal
Keywords
Slide kind
SysML Block Definition Diagram (BDD)
The scheduling message InitSession from the Net Control Station to Participating Stations has the special role of communicating the unique token for the net session and the radio channel over which the main net session radio transmissions will occur, including the radio frequency.
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Webel: SysML: If you are working within a self-contained model you may freely include diagrams icons for navigation and model elements from other Packages in a Package Diagram or "focus" BDD but beware of breaking Shared Package and library dependencies!

Amongst the RadioStation objects, only the one that is a Net Control Station has direct access to the NetSession object, which is managed by its HandlerPS. The (other) Participating Stations need however to know the current SessionToken and information about the RadioChannel to be used, which are shared by the InitSession Signal from the NCS.

Note that in the Webel Radio Net model initialising a net session is distinct from opening the net session, which is in turn distinct from joining the net session. This is reflected in the StateMachines for RadioStation and the HandlerPS of Participating Stations as we'll see later.

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Webel Radio Net: 'message' SysML Package Diagram with Message block "packet" and '$msg' String
Notes
[CONVENTION, DISPLAY, MODELLING, STYLE, TIP]{STRONG} Webel: SysMLv1: Highly recommend creating a "focus" Block Definition Diagram (BDD) for each main Block with expanded feature details and relationships to at least nearest neighbours
[NAMING, TIP]{OPTION} Optionally suffix the "focus" BDD for a Block with '.bdd' so that it won't clash with a corresponding IBD on diagram export. This is not a SysMLv1 concern, it is purely a workflow concern. It has the slight disadvantage that BDD may "indicated" twice.
[OPTION, TIP]{OPTION} Webel: SysML: If you are working within a self-contained model you may freely include diagrams icons for navigation and model elements from other Packages in a Package Diagram or "focus" BDD but beware of breaking Shared Package and library dependencies!
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