Automotive Ethernet Inquirer Circuit With Asymmetric Duplex Switching
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Solution Overview
Problem
The high power consumption of automotive Ethernet communication devices due to the requirement of full-duplex transmission mechanisms hinders the development of automotive Ethernet communication technologies, especially in electric vehicles where power efficiency is crucial.
Innovation Solution
An inquirer-side circuit with a hybrid circuit, transmitting and receiving circuits, a processing circuit, a physical coding sublayer circuit, and an echo cancellation circuit, capable of operating in asymmetry data mode to reduce power consumption by minimizing simultaneous operations of transmitting and receiving circuits, and utilizing echo cancellation signals only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex transmission mechanism is adopted for automotive Ethernet communication, then data communication capability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic operation mode switching between full-duplex and half-duplex modes based on real-time communication requirements. The system can transition from continuous full-duplex operation to selective half-duplex operation, dynamically adjusting the transmission mode to match actual data communication needs, thereby reducing unnecessary power consumption while maintaining communication capability.
Solution Approach 2:
The system employs periodic operation patterns where full-duplex transmission is activated only during specific time intervals when bidirectional communication is required, followed by periods of reduced operation or half-duplex mode. This periodic activation strategy ensures that the high-power full-duplex mode is used only when necessary, reducing overall power consumption while maintaining communication effectiveness.
2Productivity
If full-duplex transmission mechanism is adopted, then simultaneous data transmission in both directions is enabled, but power usage efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts between full-duplex and half-duplex modes based on actual communication requirements. When simultaneous bidirectional transmission is needed, full-duplex mode is activated; otherwise, the system switches to half-duplex mode, optimizing power usage efficiency while maintaining the capability for simultaneous transmission when required.
Solution Approach 2:
The patent changes operational parameters by switching between different transmission modes (full-duplex and half-duplex). This parameter change allows the system to adapt its power consumption level to match the actual communication workload, improving power usage efficiency by avoiding continuous high-power operation while preserving the ability to achieve simultaneous transmission when needed.
Data Source
AI summary
An inquirer-side circuit of an automotive Ethernet system includes: a hybrid circuit arranged to operably conduct data communication with a respondent-side circuit through an MDI circuit; a transmitting circuit coupled with a hybrid circuit and arranged to operably generate and provide a transmission signal to the hybrid circuit; a receiving circuit coupled with the hybrid circuit and arranged to operably receive and parse a received signal transmitted from the hybrid circuit to generate a data signal; a processing circuit coupled with the receiving circuit and arranged to operably process the data signal; a physical coding sublayer circuit coupled with the processing circuit and arranged to operably conduct a physical coding operation according to the instruction of the processing circuit to control the operations of the transmitting circuit; and an echo cancellation circuit coupled between the transmitting circuit and the receiving circuit, and arranged to operably generate an echo cancellation signal.