Queue-Based RFID Vehicle Sequencing System
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Solution Overview
Problem
Existing vehicle sequencing systems face challenges in accurately locating and sequencing vehicles, particularly in indoor environments where GPS signals are unreliable, and RFID approaches often result in incorrect location determination, leading to improper processing of locating actions.
Innovation Solution
A method and system that utilize queues to process locating action events for assets, including park, parked, unpark, and delay queues, to accurately determine and update the location of vehicles by analyzing packets from gateways, removing duplicates, and processing out-of-order events, ensuring accurate sequencing and location management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RFID approaches are used to determine vehicle locations, then location determination capability is provided, but accuracy and reliability of location determination deteriorate due to incorrect location determination
Solution Approach 1:
The system segments the processing of locating action events into separate queues (park queue, parked queue, unpark queue, delay queue) to handle different types of events independently. This segmentation prevents mixing of different event types that could lead to incorrect processing and improves both accuracy and reliability of location determination.
Solution Approach 2:
The system performs preliminary actions by pre-defining specific queues for different locating action event types before processing occurs. Packets are routed to appropriate queues based on their type, ensuring that parking, unparking, and delay events are processed in the correct context, thereby preventing incorrect location determination.
2Device complexity
If shared databases or hardware are used in the locating system, then system complexity is reduced, but processing accuracy deteriorates due to out of sequence receipt or processing of events and duplicate events
Solution Approach 1:
Instead of using a shared database for all locating actions, the system segments processing into separate queues for different event types (park, parked, unpark, delay). This segmentation maintains processing accuracy by preventing out-of-sequence and duplicate event processing while avoiding the complexity of implementing sophisticated conflict resolution mechanisms in a shared system.
Solution Approach 2:
The queue structure acts as an intermediary between packet receipt and final processing. Each queue serves as a buffer that ensures events are processed in the correct sequence and context, preventing duplicate processing and maintaining accuracy without requiring complex shared database management.
3Adaptability or versatility
If GPS technologies are used for vehicle location, then broad coverage is provided, but measurement precision deteriorates due to insufficient granularity and unavailability in indoor environments
Solution Approach 1:
The system substitutes GPS satellite-based positioning with RFID-based local detection using access points and gateways. This replacement provides the necessary measurement precision and granularity for indoor environments where GPS is unavailable, while maintaining adaptability across different location types through the queue-based processing framework.
Data Source
AI summary
There is a system for queue-based processing of RFID locating and sequencing at a site comprising one or more queues that are maintained and updated as locating and sequencing occurs, to ensure that out of sequence, or other complex processing, does not render inaccurate the locating and sequencing.