V2X Message Processing via Selective Filtering and Hysteresis
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Solution Overview
Problem
Vehicle-to-everything (V2X) communications face congestion issues due to the linear dependence of processing power on the number of messages received, leading to inefficiencies in message processing and transmission.
Innovation Solution
The system reduces message processing by accepting and processing a reduced number of messages from senders, such as processing every second or third message, and uses hysteresis and moving averages to stabilize system behavior and manage congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all V2X messages are processed, then complete environmental awareness is achieved, but processing power requirements increase linearly with message count
Solution Approach 1:
The patent extracts and removes redundant or low-priority messages from the processing stream. The system identifies and filters out messages that do not contribute significantly to environmental awareness, processing only the essential subset of messages. This extraction approach maintains reliable environmental awareness while reducing processing power requirements by eliminating unnecessary processing operations.
Solution Approach 2:
The patent applies different processing quality levels to different messages based on their importance. Critical messages receive full processing attention while less important messages undergo reduced processing or are filtered out. This local quality differentiation allows the system to allocate processing power selectively, maintaining high reliability for critical functions while reducing overall processing power consumption.
2Productivity
If message processing rate is reduced to decrease congestion, then processing time per message increases, but driver reaction times remain unaffected
Solution Approach 1:
The patent segments the message processing stream into different priority levels and processing queues. By dividing messages into critical and non-critical categories, the system can process critical messages with higher priority and shorter delays, while non-critical messages are processed at a reduced rate. This segmentation ensures that overall processing throughput is reduced to manage congestion, but the time loss for critical safety-related messages remains negligible and does not impact driver reaction times.
3Stability of the object's composition
If hysteresis is used to stabilize system behavior, then message processing consistency improves, but system responsiveness to sudden congestion changes decreases
Solution Approach 1:
The patent implements a dynamic hysteresis mechanism where the hysteresis thresholds and parameters are not fixed but adapt based on current system conditions. When congestion levels are moderate, stronger hysteresis is applied to stabilize processing behavior and prevent oscillations. When sudden congestion changes occur, the hysteresis effect is reduced or temporarily disabled, allowing the system to respond quickly to new conditions. This dynamic adjustment resolves the contradiction by making the system both stable during normal operation and responsive during critical transitions.
Data Source
AI summary
A vehicle control unit (VCU) or other vehicle device to accept a reduced number of messages from a sender for processing rather than having the sender transmit messages less often when a communication channel is crowded. The overall number of messages that need to be processed after accepting the messages stays the same, but the number of messages accepted per sender per time interval is reduced.