Gateway Apparatus Shared Buffer PDU Management
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Solution Overview
Problem
Existing technologies face challenges in efficiently updating software for electronic control units (ECUs) in vehicles, particularly in managing protocol data units (PDUs) to optimize reprogramming operations.
Innovation Solution
A gateway apparatus that stores and manages PDUs in a shared buffer, using binary search to identify and prioritize PDUs for efficient transmission and reprogramming, thereby minimizing the time required for reprogramming and optimizing memory usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If PDUs are managed using conventional methods without a shared buffer, then the reprogramming process is simpler, but the reprogramming time is significantly longer and memory usage is not optimized
Solution Approach 1:
The gateway apparatus performs preliminary actions by storing incoming PDUs in a shared buffer before reprogramming operations begin. This allows the system to prepare and organize protocol data units in advance, enabling faster retrieval and processing during actual reprogramming operations, thus reducing overall reprogramming time while managing complexity through structured pre-processing
Solution Approach 2:
The shared buffer acts as an intermediary component between PDU reception and reprogramming execution. It temporarily holds and manages PDUs, allowing the system to decouple the reception process from the reprogramming process. This intermediary structure enables efficient time management by allowing parallel operations and reducing waiting time, while the buffer's structured organization manages the complexity of PDU handling
2Productivity
If a shared buffer is used to store multiple PDUs, then memory usage is optimized and reprogramming efficiency improves, but the complexity of managing and retrieving specific PDUs increases
Solution Approach 1:
The gateway apparatus changes key parameters of PDUs when storing them in the shared buffer, including setting a reception completion flag, recording reception completion time, and assigning unique identifiers. These parameter transformations enable efficient retrieval and management during reprogramming operations. The parameter changes allow the system to quickly identify and retrieve specific PDUs based on timing and status criteria, improving reprogramming efficiency while managing retrieval complexity through structured data transformation
Solution Approach 2:
The system performs preliminary organization and tagging of PDUs with metadata (reception completion flags, timestamps, identifiers) before reprogramming operations. This pre-processing of PDU parameters enables efficient filtering and retrieval during reprogramming, improving overall productivity while managing complexity through structured preliminary organization rather than ad-hoc retrieval operations
3Loss of time
If the gateway apparatus manages timing and storage of multiple PDUs in a shared buffer, then reprogramming time is reduced, but the risk of data loss or corruption increases
Solution Approach 1:
The gateway apparatus implements beforehand cushioning by creating a buffered copy of PDUs in the shared buffer before original PDUs are processed or potentially lost. This cushioning mechanism preserves data integrity by maintaining redundant copies with complete metadata (reception completion flags, timestamps, identifiers), allowing the system to recover from potential data loss scenarios while enabling faster reprogramming operations through pre-prepared data availability
Solution Approach 2:
The system implements feedback mechanisms by monitoring PDU reception completion status, timing, and storage state in the shared buffer. This feedback allows the gateway apparatus to verify data integrity, detect potential issues, and manage the buffering process dynamically. The feedback loop ensures that PDUs are properly stored and retrieved, maintaining reliability while enabling time-efficient reprogramming operations through informed decision-making
Data Source
AI summary
A gateway apparatus is provided. The gateway apparatus includes memory storing computer-executable instructions and at least one processor that executes the instructions. The gateway apparatus selects a first protocol data unit (PDU) to be sent from a first network node to a second network node different from the first network node, based on the first PDU being sent to a router, searches, within a shared buffer associated with a routing path of the router, for a second PDU different from the first PDU, stores, based on determining that the second PDU is stored in the shared buffer, the first PDU in the shared buffer, and sends, to the second network node and after deleting the second PDU from the shared buffer, the first PDU.