Vehicle Communication Device Abnormal Timing Data Storage
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Solution Overview
Problem
The central gateway in existing communication devices cannot store communication information from other devices that communicate at abnormal timings, as it may remain in a continuous wake-up state due to continuous communication, preventing the storage of such information.
Innovation Solution
A communication device equipped with a communication monitoring unit, a storage medium, and a timer that accumulates and stores communication information when the wake-up state duration exceeds a predetermined time, allowing for the capture of communication data even during abnormal timings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the central gateway stores communication information only at wake-up timing, then the storage operation is simple, but communication information from abnormal timings cannot be stored
Solution Approach 1:
The communication monitoring unit continuously accumulates communication information in a buffer memory during the wake-up state, preparing the data in advance for storage. This preliminary accumulation ensures that when the predetermined time elapses, the information is already ready and can be stored without loss, even if abnormal communication occurs throughout the wake-up period.
Solution Approach 2:
A buffer memory is introduced as an intermediary component between the communication monitoring unit and the storage medium. This buffer temporarily holds the accumulated communication information, allowing the system to decouple the continuous monitoring process from the periodic storage operation, thereby resolving the contradiction between continuous data capture and periodic storage.
2Reliability
If the central gateway remains in wake-up state due to continuous communication, then communication monitoring is continuous, but the gateway cannot transition to sleep state and consume less energy
Solution Approach 1:
The system adopts periodic action by allowing the wake-up state to continue for a predetermined time regardless of continuous communication, then automatically transitioning to sleep state. This periodic cycle ensures that energy consumption is controlled while still capturing abnormal communication information that occurs during the wake-up period, resolving the contradiction between continuous monitoring and energy saving.
3Loss of information
If the central gateway stores communication information continuously, then all communication data is captured, but the storage load and processing complexity increase
Solution Approach 1:
The system applies partial action by accumulating communication information continuously in the buffer but only storing it periodically when the predetermined time elapses. This approach captures all communication information during the wake-up state without the complexity of continuous storage operations, as the actual storage to the storage medium occurs only at specific intervals.
Data Source
AI summary
An object is to provide a communication device capable of appropriately storing communication information for specifying another device that performs communication at an abnormal timing. A communication device 10 is a communication device that is mounted on a vehicle and communicates with other devices. The communication device 10 includes a communication monitoring unit 40 that monitors communication with another device and accumulates communication information for specifying another device that performs communication, a storage medium 30 that stores the communication information, and a timer 22 that counts a duration of a wake-up state of the communication device 10. When the duration of the wake-up state has passed a predetermined time, the communication monitoring unit 40 stores the accumulated communication information in the storage medium 30.