Vehicle Control Apparatus Partial Data Management
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Solution Overview
Problem
Existing vehicle-to-vehicle communication systems face challenges in managing incomplete data files during disconnections, leading to memory space tightness and inefficient communication, as current methods either waste resources by saving incomplete data or require retransmission of entire files upon reconnection.
Innovation Solution
A vehicle control apparatus that uses a processor to manage incomplete file data by setting an upper limit for saving and deletion based on parameters like throughput, signal strength, latency, and available storage space, allowing for efficient handling of partial data during disconnections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If partially received data is saved in memory during disconnection, then data can be completed upon reconnection, but memory space becomes tight and cannot store other data
Solution Approach 1:
The patent implements dynamic management of partial data by setting expiration times and priority levels that adjust based on current memory conditions and communication state. The ECU dynamically determines whether to retain or delete partial data using judgment expressions that evaluate memory availability, disconnection duration, and data importance, allowing the system to adapt between preserving data for completion and freeing memory space as conditions change.
2Quantity of substance
If partially received data is deleted to free memory space, then memory availability improves, but data must be retransmitted from beginning upon reconnection
Solution Approach 1:
The patent changes the parameter of data retention by introducing expiration time limits and priority level classifications. Instead of uniformly deleting all partial data, the system evaluates each data item against judgment expressions that consider memory space, disconnection characteristics, and data importance. This allows selective retention of high-value partial data while deleting less important data, optimizing the balance between memory usage and retransmission efficiency.
3Reliability
If data is saved indefinitely with expiration time, then data can be completed, but memory space remains tight until expiration
Solution Approach 1:
The patent segments the treatment of partial data by applying different retention policies based on priority levels and judgment expressions. High-priority data with high completion probability receives extended retention with higher expiration times, while low-priority data receives shorter retention periods. This segmentation allows the system to maintain critical data indefinitely while automatically expiring less important data, preventing permanent memory occupation by all partial data simultaneously.
Data Source
AI summary
A vehicle control apparatus includes a processor executing a communication control process of performing vehicle-to-vehicle communication, a data reception process of receiving and saving, in a storage unit, file data transmitted from a communication destination vehicle by the vehicle-to-vehicle communication, and an incompletely received file data management process of, in a case where the vehicle-to-vehicle communication is disconnected after reception of the file data by the data reception process is started and before the reception of the file data completes, setting, in accordance with a state of a predetermined parameter, at least one of an upper limit of a period for saving in the storage unit and a priority level for deleting from the storage unit for partial data of the file data saved in the storage unit.