In-Vehicle CPU Status Filtering for Overload Margin Monitoring
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Solution Overview
Problem
Existing in-vehicle information terminals lack the ability to determine the CPU's performance margin, leading to potential CPU overload, reduced responsiveness, increased heat generation, and hindered communication due to unknown operation status and excessive data transmission.
Innovation Solution
An in-vehicle device that includes a central processing unit (CPU), an obtainer to repeatedly gather operation status data, a condition determiner to select data meeting predefined criteria, and an outputter to transmit reduced data sets indicating the CPU's status, allowing servers to understand the CPU's margin accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all obtainment data is output without filtering, then complete CPU status information is provided, but data transmission volume increases and processing efficiency decreases
Solution Approach 1:
The patent extracts only the necessary CPU status information (operation status and performance margin) from the complete obtainment data using a condition determiner. This extraction principle filters out redundant data while preserving essential information about CPU load and available capacity, resolving the contradiction between information completeness and processing efficiency.
2Device complexity
If CPU operation status is not monitored, then system complexity is reduced, but CPU overload occurs and responsiveness decreases
Solution Approach 1:
The patent implements a feedback mechanism where the obtainer continuously monitors CPU operation status, the condition determiner evaluates performance margins, and the outputter transmits status information. This closed-loop feedback system maintains CPU reliability by detecting overload conditions and enabling appropriate responses, while keeping the monitoring structure relatively simple through modular functional components.
3Loss of information
If excessive data is transmitted to server, then comprehensive status reporting is achieved, but communication efficiency decreases and server processing burden increases
Solution Approach 1:
The patent applies the extraction principle by using the condition determiner to identify and output only relevant CPU status data (operation status and performance margin) that is necessary for server decision-making. This eliminates redundant data transmission while ensuring that essential information about CPU load and capacity is communicated efficiently to the server.
Data Source
AI summary
An in-vehicle device is a device provided in a vehicle, and includes: a CPU; a temperature obtainer and operation rate obtainer that repeatedly obtain obtainment data indicating at least an operation status of the CPU; a condition determiner that determines, for each of a plurality of items of obtainment data resulting from repeatedly obtaining the obtainment data, whether the item of obtainment data satisfies an extraction condition set in advance; and an outputter that outputs output data based only on one or more items of obtainment data determined to satisfy the extraction condition from among the plurality of items of obtainment data.