RTS Meeting January 2008 In-Vehicle Domains Powertrain: –Control of engine and transmission –Several complex control, high computing complexity –Multitasking and strict timing constraints –Frequent data exchanges b/w chassis and body –Requires fault tolerance, predictability and large bandwidth

Chassis: –Control of suspension, braking and steering (Active safety) –Closed loop and advanced control systems (similar to Powertrain) –ABS, ESP, ASC (Automatic Stability Control), 4WD (4 Wheel Drive), EPS (Electronic Power Steering), active suspension, ASR (Anti Slip Regulation), ACC (Adaptive Cruise Control) –Similar timing req. but more safety related –X-by-wire applications (steer-by-wire, brake-by-wire, drive-by-wire) –Requires fault tolerance, predictability, large bandwidth and flexibility to some extent –Towards time-triggered approaches Why? –Dependability (reliability + predictability) –Composability

Body: –Dashboards, wipers, lights, doors, windows, climate control etc. –Comfort functions that necessitate many exchange information –Not all nodes require a large bandwidth –LIN and TTP/A mainly used (up to 20 kbps) –for nodes that require large bandwidth and instant response  CAN-B (low speed CAN up to 125 kbps)

Safety: –Active Safety: ABS, Vehicle Dynamics Control (VDC) and cruise control –Passive Safety Systems: Airbags, Seat belt pretensioner –Requires fault tolerance, predictability, large bandwidth

Telematics: –Car radio, CD, DVD, hands-free phones, in-vehicle navigation systems, rear seat entertainment –Multimedia data streams and QoS with preserving the integrity –Security of information is important –Requires large bandwidth, flexibility, security and predictability to some extent –MOST (Media Oriented System Transport), IDB-1394

Relatively new protocols for in-vehicle networks –TTP/C: x-by-wire –TTCAN: chassis, active and passive safety systems and x-by-wire –FlexRay: x-by-wire

Possible Conferences I IEEE Vehicular Technology Conference (VTC) IEEE Real-Time Systems Symposium (RTSS) * Conference on Real-Time and Network Systems (RTNS) EUROMICRO Conference on Real-Time Systems (ECRTS) * International Workshop on Parallel and Distributed Real-Time Systems (WPDRTS) International Conference on Embedded and Real-Time Computing Systems and Applications (RTCSA) International CAN Conference (ICC) *

Possible Conferences II Workshop on Real-Time Systems (WTR) Design, Automation & Test in Europe (DATE) * IEEE International Conference on Vehicular Electronics and Safety (ICVES) European Congress Embedded Real-Time Software (ERTS) International Conference on Distributed Computing Systems (ICDCS) Automotive Electronics Conference

Main Areas of Interest –Comparison of time-triggered and event-triggered concepts –Comparison of different in-vehicle communication protocols –Application based comparison –Protocol specifications (academic protocols) and timing analysis –Scheduling applied on protocols (such as CAN, TTCAN and FlexRay) –Using relatively newer protocols for in-vehicle applications: TTP/C, FlexRay, TTCAN –Improvements on protocols Performance improvement (i.e. bus access optimization) Fault tolerance mechanisms’ improvement for more dependability (fault detection, fault and error modeling and correction) MW improvements

Integration, coherence and interoperability of different in-vehicle networks in a car FlexRay Network Reservation based approaches for hybrid communication networks INITIAL RESEARCH QUESTIONS

Integration, coherence and interoperability of different in-vehicle networks in a car –Middleware (Communication Layer) What are the functions? –Hiding the distribution and the heterogeneity of the system –Providing high level services (i.e. fault tolerance and frame packing) –Improving QoS OSEK/VDX, OSEK/VDX FTCom and Volcano OSEK/VDX implementation language and operating system (real-time application development) INITIAL RESEARCH QUESTIONS

FlexRay Network –Scheduler Design Schedulability and time analysis Bus access optimization (min. response time) Frame packing? Optimization wrt. different performance metrics? –Middleware for FlexRay Current ones for FlexRay? Additional fault tolerant mechanisms INITIAL RESEARCH QUESTIONS

Reservation based approaches for hybrid communication networks –Improvements for FTT-CAN and Server-CAN –Fault tolerance mechanisms –How to implement providing integrity? INITIAL RESEARCH QUESTIONS