Vehicle Communication Module Wake-Up Signal Gateway
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Solution Overview
Problem
Conventional vehicles face communication errors due to rapid switching of CAN communication units to sleep mode, preventing the transmission of remote signals to destination units during standby mode.
Innovation Solution
A control unit generates a wake-up signal added to the drive command signal and transmits it to the first communication unit, which includes a gateway that periodically sends wake-up signals to the second communication unit before transmitting the drive command signal, ensuring stable communication between CAN units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the CAN communication unit switches rapidly to sleep mode to save energy, then energy consumption is reduced, but communication reliability deteriorates because the unit cannot receive or transmit signals properly
Solution Approach 1:
The gateway transmits a wake-up signal to the second CAN communication unit before transmitting the drive command signal. This preliminary action ensures that the second unit is in a ready state to receive and process the command, preventing communication failures while allowing the unit to return to sleep mode afterward, thus balancing energy savings with communication reliability
Solution Approach 2:
The gateway acts as an intermediary between the control unit and the second CAN communication unit. It monitors the state of the second unit and conditionally transmits wake-up signals or drive command signals based on whether the unit is in sleep mode or ready state, thereby mediating the communication process to ensure reliability without requiring the second unit to remain continuously active
2Reliability
If the CAN communication unit remains in wakeful state to ensure signal reception, then communication reliability is improved, but energy consumption increases
Solution Approach 1:
The system uses periodic wake-up signals transmitted by the gateway at specific intervals or triggered by incoming commands. The second CAN communication unit alternates between sleep mode and ready state, waking up only when needed to receive signals. This periodic activation ensures reliable communication while minimizing energy consumption by keeping the unit in low-power state during idle periods
3Reliability
If the gateway transmits wake-up signals frequently to maintain unit readiness, then communication reliability is improved, but system complexity increases
Solution Approach 1:
The second CAN communication unit autonomously manages its own state transitions between sleep mode and ready state based on its internal timing and reception needs. The gateway simply transmits wake-up signals or drive command signals without requiring complex coordination protocols. This self-service approach simplifies the overall control logic while maintaining communication reliability
Data Source
AI summary
A communication module, a vehicle including the same, and a method for controlling the vehicle can solve a timing issue encountered when signals for the same service are communicated between different communication schemes, thereby guaranteeing stability in a telematics remote service. The vehicle includes a first communication unit configured to perform wired communication; a second communication unit configured to perform wireless communication to receive a remote signal; a control unit configured to generate a communication signal by adding a wake-up signal to a drive command signal of the received remote signal upon receiving the remote signal from the second communication unit, and to transmit the generated communication signal to the first communication unit; and a drive unit configured to receive the communication signal from the first communication unit, and to drive load on the basis of a drive command signal of the received communication signal.