1. ANDROID AUTOMOTIVE SIG
Vehicle Data APIs / Vehicle HAL Architectural Concepts (WORK-IN-PROGRESS)
22 October 2019

2. Architecture ideas Headunit VHAL ECU1 ECU2 ECU3 CAN ETH VISS server
VISS websocket solution based on VISS server-client model and using VSS data, Jason webtoken used for access control
Headunit
VHAL
ECU1
ECU2
ECU3
CAN
ETH
VISS server
Autosar
VISS client
VISS client?
Autosar/other
VCU/Gateway/
other
Autosar/
VISS clients can read/write pre-defined car data from/to VISS server
VISS server holds all car data (static tree in spec. gen1, dynamic in spec. gen2?)
CAN decod

3. Replace car API VHAL with VISS
Headunit
Google would need convincing and even so why remove this when it can co-exist?
VISS server holds all car data (static tree in spec. gen1, dynamic in spec. gen2?)
VISS client
CAR API
VHAL
VISS server
CAN decod
CAN
ETH
CAN
ETH
ETH
ECU1
VISS client
ECU2
VISS client
ECU3
Autosar
VISS client?

4. Co-exist car API VHAL with VISS
Headunit
Proposal on how Android layers match VISS!?
HOW IDL can be implemented without breaking treble. What would the impact be when doing update, cts treble other?
VISS server holds all car data (static tree in spec. gen1, dynamic in spec. gen2?)
VISS client
CAR API
VHAL
VISS server
CAN decod
CAN
ETH
CAN
ETH
ETH
ECU1
VISS client
ECU2
VISS client
ECU3
Autosar
VISS client?

5. Co-existing car API and VISS
Headunit
All apps can use CAR api, OEM apps and system apps can use vendor VISS API.
APPS
CAR API
VISS API
VHAL
VISS client
n-signals
n+x-signals
VISS server holds all car data (static tree in spec. gen1, dynamic in spec. gen2). Supplies car data to both CAR API and vendor module ”Viss client”. VISS server might hold a bigger number of signals then CAR API uses. Google car api remains.
VISS server
Socket comm.
Socket comm.
CAN decod
CAN
ETH
Remaining question (among other)
Effect on Android certification (VTS/CTS)?
Security access to signals (jason web token?)
Can this be done and still follow treble to make sure OTA compliance
Protocols between ECUs?
CAN
ETH
ETH
ECU1
VISS client
ECU2
VISS client
ECU3
Autosar
VISS client?