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The following are the assumptions that the reader needs to make while going through the use cases. Eventually, it may be possible to challenge the assumption itself and arrive at contradictory architectures that may be even better and well suited for all practical purposes.
| ID | Assumption |
|---|
| A1 | The overall system involves at least one instance of Hypervisor software |
| A2 | The overall system involves at least one instance of vehicle domain running AUTOSAR compliant software |
Use cases
| ID | Title | Description / Flow of events | Pertinent Challenges / Key points | Remarks/Comments |
|---|
| HVS-UC-01 | Rear view Camera at Startup | - User inserts the key in the key fob
- (Possibly)System initialization begins in the background
- User engages the reverse gear within 1 second
- User turns the key to crank the vehicle within 2 seconds of key insertion
- Full system initialization begins and system beings to show the boot up animation / splash screen / boot up audio
- System displays the Rear View Camera output on screen along with park distance guide
| - Which domain/virtual guest controls the first camera stream?
- Which domain/virtual guest controls the first display output?
- If there is a need for handover between virtual guests, what is the underlying protocol for handover?
- What happens if the user immediately turns off the engine?
| - Consider the scenario when the RVC output and park distance guide are being displayed on Instrument Cluster as well.
- Extending #1, what if the Instrument Cluster logic is actually from a virtual guest? Would the safety critical aspects of cluster apply? What are the limitations with respect to timing?
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| HVS-UC-02 | Entry into vehicle with an active call over Bluetooth | - User inserts the key in the fob
- (Possibly)System initialization begins in the background
- User turns the key to crank the vehicle
- Full system initialization begins and system beings to show the boot up animation / splash screen / boot up audio
- Immediately a Bluetooth call is detected and audio path is routed to cabin speakers and microphone is used for audio input
| - Which domain/virtual guest controls the first audio such as boot up audio?
- How is the handover of audio channel performed between the first audio source and call audio?
- What if the LUC was USB media and the USB media is still connected and if the USB media playback is coming from another domain/virtual guest other than the one with active call
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| HVS-UC-03 | Entry into vehicle with an active call over Bluetooth + External amplifier over Ethernet AVB |
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| HVS-UC-03 | Entry into vehicle with an active telematics call over Ethernet AVB + Reverse Gear |
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| HVS-UC-04 | Ongoing Bluetooth call in one virtual guest and Skype call in another virtual guest |
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| HVS-UC-05 | Spotify streaming using mobile data using |
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