Ethernet Switch Data Mirroring for Automotive Logging
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Solution Overview
Problem
Current methods for data logging and stimulation in automotive Ethernet networks require complex and costly measurement technology, limiting the ability to record all control unit data and transmit stimulation data effectively, as data is only available on direct paths between transmitter and receiver units, and existing interfaces cannot be used for data logging or stimulation.
Innovation Solution
A method that configures Ethernet switches to mirror data copies to a logging component, allowing data to be recorded and stimulation data to be transmitted without additional measurement technology, using existing infrastructure, by modifying header data and reserving bandwidth for logging and stimulation traffic, ensuring operational data traffic is not disrupted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex measurement technology is installed on each Ethernet data link to enable data logging, then complete data logging of all control unit data becomes possible, but device complexity and cost increase significantly
Solution Approach 1:
The Ethernet switch is configured to perform multiple functions: it acts as both a network switch for data transmission and a data logging device by copying data packets to a logging component. This eliminates the need for separate measurement technology on each data link, reducing device complexity while maintaining complete data logging capability.
Solution Approach 2:
The Ethernet switch creates copies of data packets from all data links and directs them to a central logging component. This copying mechanism enables comprehensive data logging without installing measurement technology on each individual link, as the switch captures and replicates all traffic centrally.
2Ease of manufacture
If existing interfaces are used for data logging, then installation complexity is reduced, but data traffic is disrupted due to lack of dedicated logging bandwidth
Solution Approach 1:
The Ethernet switch segments data traffic into two separate channels: the original data traffic continues through the normal data links between control units, while copied logging traffic is directed through a separate logging link to the logging component. This segmentation prevents logging operations from disrupting operational data traffic.
Solution Approach 2:
The Ethernet switch acts as an intermediary that receives all data traffic, creates copies, and directs them to the logging component without interfering with the original data flow. This mediator role allows logging to occur simultaneously with normal operations without disruption.
3Measurement precision
If special measurement technology is installed for each data link, then data logging capability is improved, but ease of operation deteriorates due to complex intervention requirements
Solution Approach 1:
The Ethernet switch is configured to perform multiple functions: it acts as both a network switch for data transmission and a data logging device by copying data packets to a logging component. This eliminates the need for separate measurement technology on each data link, reducing device complexity while maintaining complete data logging capability.
Solution Approach 2:
The Ethernet switch automatically performs data logging by configuring itself to copy data packets to the logging component. This self-service capability eliminates the need for complex manual intervention and installation of separate measurement technology, making the system easier to operate while maintaining comprehensive logging.
Data Source
AI summary
The invention relates to a method and a device for recording data or for transmitting stimulation data, which are transmitted in Ethernet-based networks of vehicles. A method for recording data is described, wherein the data are transmitted from a transmitting control unit to a receiving control unit of a vehicle via a communication system of the vehicle. The communication system comprises an Ethernet network, wherein the data are conducted from a transmission component to a reception component of the Ethernet network via a transmission path, and wherein the data are to be recorded at a logging component of the Ethernet network, which does not lie on the transmission path. The method comprises the configuration of an intermediate component of the Ethernet network, which lies on the transmission path, to transmit a copy of the data as logging data to the logging component; and the recording of the logging data at the logging component.