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Ethernet in Automotive applications

Ethernet in Automotive applications. Helge Zinner Norbert Balbierer Continental Automotive GmbH. The most successful Network Technology becomes Automotive. BU I&C Multimedia Rearseat. BU I&C Connectivity Telematics. BU ID Instrumentation & Displays. BU B&S Antenna. BU ADAS

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Ethernet in Automotive applications

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  1. Ethernet in Automotive applications Helge Zinner Norbert Balbierer Continental Automotive GmbH

  2. The most successful Network Technology becomes Automotive BU I&C Multimedia Rearseat BU I&C Connectivity Telematics BU ID Instrumentation & Displays BU B&S Antenna BU ADAS Cameras BU B&S Body Control Div C BU S, CC, EBS BU C Mobile Devices Div P BU ES, S&A, TR IP (Internet Protocol) / Ethernet Optical Ethernet Electrical Ethernet "Wireless" Ethernet Seamless IP World 1970 Today Next Step Vision Continental Ethernet/IP Motivation Car Networks Evolution and Forecast Increasing • Bandwidth • Technology Diversity • Nr. of Sub-Networks • Complexity • BoM • Personal Costs • Weight • Cable Space

  3. Topics currently addressed • Real Time Ethernet for Automotive • AVB introduction • AVB for Automotive • Network and configuration management • Selective wakeup and shutdown • Car network management 3

  4. Real Time Ethernet for Automotive What is Audio Video Bridging (AVB)? 802.1 AS Time Synchronisation 802.1 Qav Forwarding and Queuing Enhancements 802.1 Qat Stream Reservation

  5. Common time basis Synchronization of networked ECUs Coordinating multiple ECUs Meets jitter and wander requirements Guarantees timely execution Administration free protocol Real Time Ethernet for AutomotiveWhy does AVB suite In-Vehicle Requirements? Speaker 802.1 AS TFT HU Switch Speaker DVD RSE Speaker Switch Master Clock Synchronized Clock

  6. Segregate, rate frames in Switches Separation of Real time traffic (e.g. Brake) from Non-real time traffic (e.g. Audio) Allows physical consolidation of subnetworks Protects the vehicle from external traffic Queing and traffic shaping Assures maximum delays Reduces latency Gives class based gurantees Real Time Ethernet for Automotive Why does AVB suite In-Vehicle Requirements? Switch Switch ABS DVD 802.1 Qav HU ACC

  7. Event triggered QoS Flexible to changing environments More effective use of bandwidth Dynamic network resource reservation Reservation on demand Guarantees fixed ressources Dynamic End-to-End management Real Time Ethernet for Automotive Why does AVB suite In-Vehicle Requirements? Resource Reservation Switch Switch ABS ACC CAM TFT 802.1 Qat

  8. Real Time Ethernet for Automotive Impact of AVB on Architecture Powertrain Chassis Multimedia Body Powertrain Powertrain Multimedia Multimedia

  9. Ethernet AVB provides Quality of Service necessary in the vehicle Ethernet AVB provides similar costs to standard Ethernet Current activities: Integration of AVB in Automotive ECUs The authors recommend to use standards Research on QoS model for different data transmission Evaluation of enhancements and modifications of AVB Real Time Ethernet for Automotive Summary and next steps

  10. Network and Configuration Management Not all ECUs needed at a time, depending on vehicle state  Energy can be preserved by disabling unneeded devices Need for controlled activation and deactivation of devices or subsystems At present: done by energy detection on common bus systems (CAN, MOST, FlexRay) 10 10 Bus topology

  11. Network and Configuration Management Energy detection in fully switched Ethernet networks Physical point-to-point connections Activity only detected by one single host Control host state by controlling link state Advantage:Ability to control devices individually 11 11 Switched Ethernet

  12. Sent when PHY is enabled Used for Link Test (10BaseTX) Autonegotiation (100, 1000BaseT) Sent every 16 ms New additional use:Link energy control Network and Configuration Management Link Pulses 12 12 Single pulse: approx. 2 V amplitude, 100 ns duration

  13. Network and Configuration Management Fundamental elements of the concept management protocol,e.g. SNMP 13 13 Network Manager Control & Surveillance Notifications Link Energy Detection Switch Manager Link Activity

  14. Network and Configuration Management Current activities and next steps 14 Integration of SNMP into an Automotive Environment Examination of different approaches to network configuration Research on algorithms which allow dynamic reconfiguration of the system Analysis of energy saving capabilities Realization of an experimental model network for concept evaluation 14

  15. For Questions/Discussion Please mail to: helge.zinner@continental-corporation.com norbert.balbierer@continental-corporation.com josef.noebauer@continental-corporation.com Continental Automotive GmbH Regensburg, Germany

  16. Backup

  17. Demonstrator Setup

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