ethernet in automotive applications
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
The Fully Networked Car Geneva, 3-4 March 2010
1Ethernet in Automotive applications
Helge Zinner Norbert BalbiererContinental Automotive GmbH
The Fully Networked Car Geneva, 3-4 March 2010
2Continental Ethernet/IP Motivation
Car Networks Evolution and Forecast
1970 Today Next step Vision
Bandwidth
Complexity&Costs w/o IP/Ethernet
Complexity&Costs with IP/Ethernet
Increasingo Bandwidtho Technology Diversityo Nr. of Sub-Networkso Complexityo BoMo Personal Costso Weighto Cable Space
Seamless IP World
IP (Internet Protocol) / Ethernet
BU B&S
Antenna
BU I&C
Connectivity Telematics
BU I&C
Multimedia Rearseat
BU ID
Instrumentation
& Displays
BU B&S
Body Control
BU ADAS
Cameras
BU C
Mobile Devices
Div C
BU S, CC, EBS
Optical Ethernet
Electrical Ethernet
"Wireless" Ethernet
The most successfulNetwork Technologybecomes Automotive
Div P
BU ES, S&A, TR
Today Next Step Vision1970
The Fully Networked Car Geneva, 3-4 March 2010
3Topics 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
3
The Fully Networked Car Geneva, 3-4 March 2010
4Real Time Ethernet for Automotive What is Audio Video Bridging (AVB)?
Time Synchronisation
Forwarding and Queuing Enhancements
Stream Reservation
802.1AS
802.1Qav
802.1Qat
The Fully Networked Car Geneva, 3-4 March 2010
5Real Time Ethernet for Automotive Why does AVB suite In-Vehicle Requirements?
802.1AS
o Common time basis• Synchronization of networked ECUs• Coordinating multiple ECUs
o Meets jitter and wander requirements• Guarantees timely execution• Administration free protocol
TFT
RSE
Switch
Speaker
Speaker
HUSwitch
Speaker
DVD
Master Clock Synchronized Clock
The Fully Networked Car Geneva, 3-4 March 2010
6Real Time Ethernet for Automotive Why does AVB suite In-Vehicle Requirements?
802.1Qav
ABSDVD
ACC
Switch Switch
HU
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
o Queing and traffic shaping• Assures maximum delays • Reduces latency• Gives class based gurantees
The Fully Networked Car Geneva, 3-4 March 2010
7Real Time Ethernet for Automotive Why does AVB suite In-Vehicle Requirements?
802.1Qat
o Event triggered QoS• Flexible to changing environments• More effective use of bandwidth
o Dynamic network resource reservation• Reservation on demand• Guarantees fixed ressources • Dynamic End-to-End management
ABS
TFT
ACC
CAM
SwitchResource Reservation
Switch
The Fully Networked Car Geneva, 3-4 March 2010
8Real Time Ethernet for Automotive Impact of AVB on Architecture
Multimedia MultimediaPowertrain Powertrain
Powertrain
Chassis
Multimedia
Body
The Fully Networked Car Geneva, 3-4 March 2010
9Real 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
101010Network 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
111111Network 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
Switched Ethernet
The Fully Networked Car Geneva, 3-4 March 2010
12
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
1212Network and Configuration Management Link Pulses
Single pulse: approx. 2 V amplitude, 100 ns duration
The Fully Networked Car Geneva, 3-4 March 2010
131313Network and Configuration Management Fundamental elements of the concept
NetworkManager
SwitchManager
LinkEnergy
Detection
Notifications
Control & Surveillance
Link Activity
management protocol,e.g. SNMP
The Fully Networked Car Geneva, 3-4 March 2010
1414Network and Configuration Management Current activities and next steps
o Integration of SNMP into an Automotive Environmento Examination of different approaches to network
configurationo Research on algorithms which allow dynamic
reconfiguration of the systemo Analysis of energy saving capabilitieso Realization of an experimental model network for concept
evaluation
14
The Fully Networked Car Geneva, 3-4 March 2010
15
For Questions/DiscussionPlease mail to:
[email protected]@continental-corporation.com
Continental Automotive GmbHRegensburg, Germany
The Fully Networked Car Geneva, 3-4 March 2010
16
Backup
The Fully Networked Car Geneva, 3-4 March 2010
17Demonstrator Setup