Electronics & Connectivity - September 5, 2012 - 7

Ethernet in cars: an idea whose time has come
The automotive industry has been dabbling with the idea of Ethernet-based in-car networking for a while. To have a switched network and a communication based on the ISO OSI (Open Systems Interconnection) layering model has long promised the needed flexibility, scalability, and support of higher data rates. The breakthrough in the industry, though, has come with an Ethernet physical layer that allows for the in-car transmission of 100-Mbps Ethernet packets over cost-efficient UTSP (unshielded twisted single pair) cables. For future applications, the IEEE 802.3 working group has decided to investigate the development of an automotive-suitable Gbit Ethernet and, therefore, placed a final stepping stone for the success of Ethernet-based communication in automotive.

Dr. Kirsten Matheus joined BMW in 2009 with responsibility for establishing Ethernetbased communication at BMW and within the automotive industry. She currently chairs the OPEN Alliance and helped establish the IEEE 802.3 RTPGE working group.

Background

Software and electronics are the innovation drivers in the automotive industry. A highThe first BMW to use Ethernet was the current 7 Series, getting the end car can easily contain more technology in 2008 (2012 model shown). The real breakthrough for than a hundred ECUs (elecEthernet in cars will come with the cost-efficient OPEN Alliance tronic control units) and the BroadR Reach Ethernet solution. amount of flashable software in BMWs broke the GByte threshold back in 2008. past, the industry has lately been converging on Considering that ever more traditionally mechanitechnologies like LIN (local interconnect network), cal functions in cars are supported by, if not reCAN (controller area network), FlexRay, and placed with, electronics, the trend to more software MOST (media-oriented system transport). Each of and electronics will continue. A functional and reli- these technologies is ideal for a specific use case, able in-car network is therefore a must. but not only is there no migration path from one to The car industry has been aware of this and genthe next, each technology is based on a fundamenerated networking solutions for their actual needs. tally different communication principle. In addiAmong a multitude of solutions deployed in the tion, none has been designed to follow the ISO OSI
SAE electronics+connectivity September 5, 2012

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Electronics & Connectivity - September 5, 2012

Table of Contents for the Digital Edition of Electronics & Connectivity - September 5, 2012

Electronics & Connectivity - September 5, 2012
Contents
The Ups and Downs of Connectivity
Tech Report
Securing IT in the sky
Data Collection Made Easy
Ad Index
Resource Links
Upcoming from the Editors
Electronics & Connectivity - September 5, 2012 - Cover1
Electronics & Connectivity - September 5, 2012 - Electronics & Connectivity - September 5, 2012
Electronics & Connectivity - September 5, 2012 - Contents
Electronics & Connectivity - September 5, 2012 - The Ups and Downs of Connectivity
Electronics & Connectivity - September 5, 2012 - Tech Report
Electronics & Connectivity - September 5, 2012 - 5
Electronics & Connectivity - September 5, 2012 - 6
Electronics & Connectivity - September 5, 2012 - 7
Electronics & Connectivity - September 5, 2012 - 8
Electronics & Connectivity - September 5, 2012 - 9
Electronics & Connectivity - September 5, 2012 - 10
Electronics & Connectivity - September 5, 2012 - 11
Electronics & Connectivity - September 5, 2012 - 12
Electronics & Connectivity - September 5, 2012 - 13
Electronics & Connectivity - September 5, 2012 - Securing IT in the sky
Electronics & Connectivity - September 5, 2012 - 15
Electronics & Connectivity - September 5, 2012 - 16
Electronics & Connectivity - September 5, 2012 - 17
Electronics & Connectivity - September 5, 2012 - 18
Electronics & Connectivity - September 5, 2012 - 19
Electronics & Connectivity - September 5, 2012 - Data Collection Made Easy
Electronics & Connectivity - September 5, 2012 - 21
Electronics & Connectivity - September 5, 2012 - 22
Electronics & Connectivity - September 5, 2012 - 23
Electronics & Connectivity - September 5, 2012 - 24
Electronics & Connectivity - September 5, 2012 - Upcoming from the Editors
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