Vehicle Network Power Over Data Line Node Mode Switching
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Solution Overview
Problem
Current vehicle network power supply systems, which separate power and data lines, can fail if a fault occurs, leading to operational issues in electronic devices and the network.
Innovation Solution
Implementing a power over data line (PoDL) scheme where communication nodes with both power sourcing equipment (PSE) and powered device (PD) capabilities can switch between power supply modes to maintain operation even if one component fails, using the other component to obtain power from another node and monitoring the data line for faults.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If power and data are transmitted through a single line (PoDL scheme), then the network expandability and transmission rate are improved, but the reliability deteriorates because power supply may terminate if a fault occurs
Solution Approach 1:
The patent changes the operational parameters of communication nodes by enabling them to switch between different power supply modes (PSE mode and PD mode). This allows nodes to adapt their power acquisition method based on system conditions, resolving the contradiction between using a single line for both power and data while maintaining supply reliability through parameter variation.
Solution Approach 2:
The patent introduces dynamic functionality where communication nodes can dynamically switch between acting as power sources (PSE) and power consumers (PD). This dynamic role switching enables the system to maintain power supply reliability even when using a single line for both power and data transmission, as nodes can adapt their power acquisition strategy based on real-time system conditions.
2Reliability
If power and data are transmitted through separate lines, then the power supply reliability is improved, but the device complexity and cost increase
Solution Approach 1:
The patent merges the power transmission and data transmission functions into a single communication line. By implementing PoDL capability in Ethernet-based vehicle networks, the system transmits both power and data through the same physical medium, thereby reducing device complexity and eliminating the need for separate power lines while maintaining operational reliability through intelligent power management.
Solution Approach 2:
The patent makes the communication line universal by enabling it to perform multiple functions: both data transmission and power transmission. The Ethernet cable serves dual purposes, carrying both communication signals and electrical power, which simplifies the network structure and reduces the number of components needed while maintaining reliability through the PoDL protocol.
3Reliability
If communication nodes have both PSE and PD capabilities, then the network reliability is improved through fault tolerance, but the device complexity increases
Solution Approach 1:
The patent implements multi-functionality in communication nodes by equipping them with both PSE and PD capabilities. Each node can function as both a power source and a power consumer, enabling flexible power distribution and fault tolerance in the network. This universal capability allows nodes to adapt their role based on system conditions, improving reliability while the integrated design keeps complexity manageable.
Data Source
AI summary
An operation method of a first communication node in a vehicle network, which includes a power sourcing equipment (PSE) for supplying power to a second communication node and a powered device (PD) for obtaining power from the second communication node, includes: operating the first communication node in a first mode based on the PSE that is activated and the PD that is inactivated; receiving a first signal requesting power supply from the second communication node; and supplying power to the second communication node in response to the first signal.