Power Saving in Automotive Ethernet
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A network sleep and wake-up concept designed to promote in-vehicle energy efficiency is nowhere to be found in the BroadR-Reach automotive Ethernet standard . However, a variety of approaches which would be compatible with the standard are conceivable. Below we set out some objectives in relation to the implementation of a sleep and wake-up process and take a closer look at various possible approaches. On technical grounds we shall come down in favour of an approach which permits the control of the sleep and wake-up processes using the network’s own resources. We go on to discuss partial networking as a network management operational state for an Ethernet-based transmission system and show how the associated sleep and wake-up process can be implemented at physical level. The proposed solution employs familiar AUTOSAR control mechanisms which are already in use in today’s vehicle networks.
KeywordsAutomotive Ethernet Physical Layer Switch Power Saving Partial Networking OpenAlliance
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