3D Vehicle Memory Isolation for Stable Fail-Safe Data Processing
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Solution Overview
Problem
Existing vehicle memory systems lack stability in data processing due to the absence of a robust fail-safe isolation architecture, particularly when integrating 3D memory structures with vehicle controllers.
Innovation Solution
A vehicle memory system incorporating a 3D memory-based fail-safe isolation (FSI) architecture, which includes a stacked structure of function devices and memory layers connected via through-silicon electrodes, allowing for separate data access and recovery processing to ensure system stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a 3D memory structure is integrated with a vehicle controller to increase memory capacity, then the memory storage capability is improved, but the system stability and data processing reliability deteriorate due to lack of fail-safe isolation architecture
Solution Approach 1:
The memory system is divided into two independent memory layers: a first memory layer for safety-critical functions and a second memory layer for non-safety functions. This segmentation isolates safety-critical data from potential failures in non-safety functions, allowing the system to maintain high storage capacity while ensuring data processing stability through architectural separation.
Solution Approach 2:
A memory isolation layer is introduced as an intermediary between the first function device (safety-critical) and the second function device (non-safety). This isolation layer prevents direct access between the two function devices, blocking potential failure propagation while maintaining the benefits of 3D stacked memory integration for increased storage capacity.
2Productivity
If a shared memory layer is used between safety-critical and non-safety function devices to improve resource utilization, then the system efficiency is improved, but the risk of data contamination and failure propagation increases
Solution Approach 1:
The harmful factor of direct memory access between safety-critical and non-safety functions is extracted by introducing a dedicated memory isolation layer. This layer is positioned between the first and second function devices, removing the direct connection that could allow data contamination while preserving efficient memory resource utilization through the shared first memory layer.
Solution Approach 2:
The memory isolation layer serves as an intermediary that mediates between safety-critical and non-safety memory access requests. It allows the first function device to access the first memory layer for efficient operation while blocking unauthorized access from the second function device, thus preventing data contamination while maintaining system efficiency.
3Reliability
If recovery processing is implemented for failed function devices to improve system reliability, then the fail-safe capability is improved, but the system complexity increases
Solution Approach 1:
The recovery processing system is segmented into dedicated recovery processing units: a first recovery processing unit for the first function device and a second recovery processing unit for the second function device. This segmentation simplifies the overall system by providing specialized, targeted recovery mechanisms for each function device rather than a complex unified recovery system.
Solution Approach 2:
Each memory layer has localized quality characteristics tailored to its function: the first memory layer is optimized for safety-critical operations with corresponding recovery processing, while the second memory layer is optimized for non-safety operations. This local optimization reduces overall system complexity by avoiding the need for a single complex recovery mechanism to handle all scenarios.
Data Source
AI summary
A vehicle memory system and a driving method thereof are provided. The vehicle memory system includes a first function device that is configured to perform a safety function of a vehicle and a second function device that is configured to perform a convenience specification function of the vehicle. A first memory layer is shared by the first function device and the second function device and a second memory layer is used solely by the second function device. A vehicle memory device has a stacked structure including a through-silicon electrode connecting the first function device, the first memory layer, the second function device, and the second memory layer.