Notes

Performance improvements

1. Encoding (Protobuf, Flatbuffer)
2. Configurable selection of data to include in OSI messages
3. Ensure data modeling takes account of performance
4. Separate static and dynamic information from groundTruth. Maybe even discuss "delta encoding" (only send the data that has changed)

Encoding (Protobuf, Flatbuffer)

Performance sufficient for the initial "Standard" use case, i.e. object based modeling

Increased Simulation complexity will place significantly increased performance requirements on OSI. This will be due to e.g.: * Quantity or complexity of sensors in Simulation * Increased resolution of environment model * Increasing additions to the OSI Data Model

Protobuf has problems with encoding/decoding large data quantities and is thus a performance bottleneck. An alternative is Flatbuffer, which is significantly faster for encoding and does not even require decoding in all cases. Its focus is more on efficiency, thus programming complexity is greater. Could be directly supported in addition to Protobuf

Deliverable

This group shall provide a usage guide for the use cases detailed in the project proposal

• encoding recommendations (Protobuf, Flatbuffer, etc.)
• performance pitfalls & recommendations
• interaction between data & transport layer (OSI vs. packaging)
• (content from WP traffic): guidelines on formatting and structuring of messages to support use case 3 (measurement file)

The group should also discuss packaging concepts and provide a recommendation for the next steps (e.g. in a further project)

OSI should not be a bottleneck in any of the project use cases, each use case thus needs to be evaluated

Tasks

1. Configurable selection of data to include in OSI messages
2. Ensure data modeling takes account of performance
3. Separate static and dynamic information from groundTruth. Maybe even discuss "delta encoding" (only send the data that has changed) (T.Nader)

WP1: Sensor Modeling

WP2: Traffic Participants & Infrastructure

WP 4: Harmonization with OpenX
 

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