Ethernet

Basic Description

Many automotive industry observers consider Ethernet to the the automotive communication bus of the future, replacing CAN, FlexRay and MOST. In 2010, the OPEN (One Pair Ether-Net) Alliance was founded to develop and promote the adoption of the Ethernet standard in automotive systems. A key part of this effort was a proprietary technology developed by Broadcom Corporation that helps to overcome EMI issues associated with transmitting 100 Mbps Ethernet over unshielded twisted wire pair (TWP) cable. BMW recently became the first OEM to use this technology in their X5 SUV. The BMW implementation uses single-pair twisted wire, 100Mbps Ethernet to connect its driver-assistance cameras.

Perhaps the most appealing features of Ethernet communication are the high potential data rates (hundreds of Mbps to Gbps) and the availability of low-cost parts and experienced developers.

Key Features

Maximum Data Rate: 100 Mbps (automotive)
Network Topology: Star, Line or Clustered

For More Information

[1] Ethernet, Wikipedia.

[2] Open Alliance Web Site.

[3] Real-Time Automotive Ethernet, Electronic Specifier, Dec. 12, 2013.

[4] Ethernet: The Fast Track to the Connected Car, Automotive World, Aug. 20, 2014.