Vehicle Gateway Standby Mode with LTE Keep-Alive
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Solution Overview
Problem
Commercial vehicle fleets face challenges in efficiently managing fuel and energy usage due to the complexity and diversity of vehicle activities, and existing vehicle gateway devices consume high power, making it difficult to maintain data connectivity in standby modes.
Innovation Solution
A vehicle gateway device that enters a standby power mode to reduce power consumption by deactivating peripherals, while maintaining a Long-Term Evolution (LTE) network connection with a management server using keep-alive packets, allowing for timely data retrieval and reduced power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the vehicle gateway device operates in full power mode to maintain data connectivity and respond to requests, then data retrieval timeliness is improved, but power consumption increases
Solution Approach 1:
The gateway device dynamically adjusts its operational state based on incoming requests. It transitions between full power mode (when requests are received) and standby power mode (when no requests are pending), allowing the system to optimize the balance between response timeliness and energy consumption rather than operating in a fixed state
Solution Approach 2:
The system uses periodic wake-up intervals in standby mode to check for incoming requests. This periodic action allows the device to remain mostly dormant to save power while still being able to respond to data retrieval requests in a timely manner when they occur
2Use of energy by moving object
If the vehicle gateway device enters standby power mode to reduce power consumption, then power usage is reduced, but data retrieval capability deteriorates
Solution Approach 1:
The gateway device maintains a listening state for incoming requests even in standby mode, and transitions to full power mode in advance when a request is detected. This preliminary action ensures that data retrieval capability is restored before actual data requests need to be processed, maintaining productivity while minimizing the time spent in high-power state
Solution Approach 2:
The system changes operational parameters by switching between two distinct power modes (full power and standby) based on the presence or absence of data retrieval requests. This parameter change allows the device to optimize between power consumption and data retrieval capability by adapting its state to current operational needs
Data Source
AI summary
A system receives vehicle metric data from a gateway device connected to a vehicle via a network connection. In a first power mode, the vehicle gateway device gathers vehicle metric data related to operation of the vehicle and/or location data and sends requested vehicle metric data to the system. Based on a lack of input, the vehicle gateway device enters a standby power mode to reduce the power consumption of the vehicle gateway device. The vehicle gateway device reduces the power consumption by reducing activity of the vehicle gateway device. Instead of reinitiating a network connection periodically to receive requests for vehicle metric data from the system, the vehicle gateway device maintains the network connection by sending keep alive messages between the vehicle gateway device and the system. The system uses the maintained network connection to request vehicle metric data.