In the Runtime Environment-managed mode, data elements that arrive on AUTOSAR receiver ports transform into triggered operations. When a data element arrives, the Runtime Environment (RTE) calls a corresponding active operation that directly triggers a transition on the statechart. Queuing is done by the Runtime Environment in the level of AUTOSAR data elements. In this mode, only triggered operations that originate from the arrival of AUTOSAR data elements can trigger transitions on the statechart.
In Rhapsody-managed mode, data elements that arrive on AUTOSAR receiver ports transform into Rhapsody events. When a data element arrives, an active operation is called that queues the corresponding event on the event queue for the Rhapsody implementation block. The doExecute command for the implementation block runs and dispatches the events into the statechart one by one, imitating the typical Rhapsody mechanism. This mode involves double queuing: by the Runtime Environment and by Rhapsody.