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Ethernet in Automotive applications Helge Zinner Norbert Balbierer Continental Automotive GmbH The Fully Networked Car Geneva, 3-4 March 2010 1 Continental Ethernet/IP Motivation 2 Car Networks Evolution and Forecast Increasing o Bandwidth o Technology Diversity o Nr. of Sub-Networks o Complexity o BoM o Personal Costs o Weight o Cable Space The most successful Network Technology becomes Automotive BU I&C BU ID Bandwidth Complexity&Costs w/o IP/Ethernet Complexity&Costs with IP/Ethernet 1970 Today Next step Vision BU I&C Multimedia Rearseat Instrum entation & Displays Connectivity Telematics BU B&S Antenna BU ADAS BU B&S Cameras Body Control Div C Div P BU S, CC, EBS BU C Mobile Devices BU ES, S&A, TR IP (Internet Protocol) / Ethernet "Wireless" Ethernet 1970 Today The Fully Networked Car Geneva, 3-4 March 2010 Next Step Vision Optical Ethernet Seamless IP World Electrical Ethernet Topics currently addressed o Real Time Ethernet for Automotive • AVB introduction • AVB for Automotive o Network and configuration management • Selective wakeup and shutdown • Car network management The Fully Networked Car Geneva, 3-4 March 2010 3 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 The Fully Networked Car Geneva, 3-4 March 2010 4 Real Time Ethernet for Automotive Why does AVB suite In-Vehicle Requirements? 802.1 AS Speaker o Common time basis • Synchronization of networked ECUs • Coordinating multiple ECUs TFT Speaker DVD RSE o Meets jitter and wander requirements • Guarantees timely execution • Administration free protocol Speaker Switch Master Clock The Fully Networked Car Geneva, 3-4 March 2010 Synchronized Clock HU Switch 5 Real Time Ethernet for Automotive Why does AVB suite In-Vehicle Requirements? Switch Switch ABS DVD o 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 802.1 Qav ACC o Queing and traffic shaping The Fully Networked Car Geneva, 3-4 March 2010 HU • Assures maximum delays • Reduces latency • Gives class based gurantees 6 Real Time Ethernet for Automotive Why does AVB suite In-Vehicle Requirements? Resource Reservation Switch 7 Switch ABS o Event triggered QoS ACC • Flexible to changing environments • More effective use of bandwidth TFT o Dynamic network resource reservation 802.1 Qat • Reservation on demand • Guarantees fixed ressources • Dynamic End-to-End management The Fully Networked Car Geneva, 3-4 March 2010 CAM Real Time Ethernet for Automotive Impact of AVB on Architecture 8 Powertrain Chassis Multimedia Body Multimedia Powertrain Multimedia Powertrain The Fully Networked Car Geneva, 3-4 March 2010 Real Time Ethernet for Automotive Summary and next steps o Ethernet AVB provides Quality of Service necessary in the vehicle o Ethernet AVB provides similar costs to standard Ethernet o Current activities: Integration of AVB in Automotive ECUs o The authors recommend to use standards o Research on QoS model for different data transmission o Evaluation of enhancements and modifications of AVB The Fully Networked Car Geneva, 3-4 March 2010 9 Network and Configuration Management o Not all ECUs needed at a time, depending on vehicle state Energy can be preserved by disabling unneeded devices o Need for controlled activation and deactivation of devices or subsystems o At present: done by energy detection on common bus systems (CAN, MOST, FlexRay) Bus topology The Fully Networked Car Geneva, 3-4 March 2010 10 Network and Configuration Management Energy detection in fully switched Ethernet networks o Physical point-to-point connections o Activity only detected by one single host o Control host state by controlling link state o Advantage: Ability to control devices individually The Fully Networked Car Geneva, 3-4 March 2010 Switched Ethernet 11 Network and Configuration Management Link Pulses o Sent when PHY is enabled o Used for • Link Test (10BaseTX) • Autonegotiation (100, 1000BaseT) o Sent every 16 ms o New additional use: Link energy control The Fully Networked Car Geneva, 3-4 March 2010 Single pulse: approx. 2 V amplitude, 100 ns duration 12 Network and Configuration Management Fundamental elements of the concept Network Manager Control & Surveillance Notifications Switch Manager The Fully Networked Car Geneva, 3-4 March 2010 Link Activity management protocol, e.g. SNMP Link Energy Detection 13 Network and Configuration Management Current activities and next steps 14 o Integration of SNMP into an Automotive Environment o Examination of different approaches to network configuration o Research on algorithms which allow dynamic reconfiguration of the system o Analysis of energy saving capabilities o Realization of an experimental model network for concept evaluation The Fully Networked Car Geneva, 3-4 March 2010 15 For Questions/Discussion Please mail to: [email protected] [email protected] [email protected] Continental Automotive GmbH Regensburg, Germany The Fully Networked Car Geneva, 3-4 March 2010 16 Backup The Fully Networked Car Geneva, 3-4 March 2010 Demonstrator Setup The Fully Networked Car Geneva, 3-4 March 2010 17