Vehicle ECU Wake-Up Control for Low-Power Bus Communication
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Solution Overview
Problem
Existing vehicle-mounted systems do not consider power consumption, leading to inefficiencies in energy use.
Innovation Solution
A vehicle-mounted system with a management device that controls the power states of connected devices, transitioning between low power and high power states based on data reception to optimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If devices are kept in high power state to ensure immediate data processing capability, then response speed is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the power state of ECUs based on real-time communication needs. ECUs transition between low power state and high power state according to whether they need to transmit or receive data, optimizing the balance between response speed and power consumption.
Solution Approach 2:
The power state parameter of ECUs is changed based on communication requirements. When data transmission or reception is needed, ECUs switch to high power state; otherwise, they remain in low power state, thereby controlling overall system power consumption while maintaining necessary responsiveness.
2Reliability
If all ECUs are kept in high power state to ensure system responsiveness, then system reliability is improved, but energy efficiency deteriorates
Solution Approach 1:
The system segments ECUs into different power states based on their current communication needs. Instead of keeping all ECUs in high power state, only those requiring communication remain active while others enter low power state, achieving both energy efficiency and maintained system responsiveness where needed.
Solution Approach 2:
ECUs periodically transition between power states based on communication requirements. The management device monitors communication needs and triggers state transitions, ensuring ECUs are in high power state only when necessary for data transmission or reception, thereby improving energy efficiency while maintaining system reliability.
3Productivity
If ECUs transition to high power state upon receiving any data, then data processing capability is improved, but power consumption increases
Solution Approach 1:
Different ECUs are assigned different power states based on their specific communication needs rather than uniformly transitioning all ECUs to high power state. Only ECUs that actually need to process received data or transmit data transition to high power state, while others remain in low power state, optimizing the balance between data processing capability and power consumption.
Data Source
AI summary
In a vehicle-mounted system, a first ECU (or “first vehicle-mounted device”) and a second ECU (or “second vehicle-mounted device”) are connected to a communication bus. When the first ECU has received the first or second activation data via the communication bus in a low-power state where power consumption is low, the first ECU transitions to a high power state whose power consumption is larger than the low power state. When the second ECU has received the first data via the communication bus in a low-power state where power consumption is low, the second vehicle-mounted device is maintained in the low power state. When the second ECU has received the second data via the communication bus in the low-power state, the second ECU transitions to a high power state. A management device transmits the first activation data and the second activation data via the communication bus.