Adaptive V2I Map Transmission for Bandwidth-Constrained Hazard Alerts
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Solution Overview
Problem
Vehicle-to-infrastructure (V2I) communications face limitations due to limited bandwidth and the use of lossy data compression techniques, which result in data loss and degraded resolution when transmitting information about objects and hazards to vehicles.
Innovation Solution
A method and system that generate and transmit area maps by excluding sub-areas not relevant to vehicle paths, using occupancy boxes to represent objects, and transmitting only updated information in a prioritized manner to conserve bandwidth while ensuring timely and accurate data delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If data compression techniques are used to transmit area map data, then bandwidth utilization is improved, but data loss and degraded resolution occur
Solution Approach 1:
The area map is divided into multiple sub-areas, and occupancy information is segmented by sub-area and by object type. This segmentation allows selective transmission of only relevant updates rather than compressing entire maps, achieving efficient bandwidth use without lossy compression
Solution Approach 2:
The system extracts and transmits only the essential occupancy status information for each sub-area rather than transmitting complete compressed images. By taking out only the necessary data elements (occupancy boxes, object locations), the system avoids information loss while optimizing bandwidth
2Loss of information
If complete area maps are transmitted to all vehicles, then information completeness is improved, but bandwidth consumption increases
Solution Approach 1:
Different vehicles receive different subsets of area map data based on their specific needs, locations, and paths. Each vehicle gets customized occupancy information for relevant sub-areas rather than universal complete maps, achieving local optimization of bandwidth usage while maintaining information completeness for each vehicle's context
Solution Approach 2:
The system transmits partial area map information - only the portions relevant to each vehicle's path and location. This partial action approach sends sufficient data for safe operation without the excessive bandwidth consumption of transmitting complete maps to all vehicles
3Loss of time
If frequent updates are transmitted to maintain real-time accuracy, then data timeliness is improved, but bandwidth usage increases
Solution Approach 1:
The system implements periodic transmission of area map updates at optimized intervals rather than continuous transmission. Updates are sent when occupancy status changes in monitored sub-areas, achieving real-time accuracy without excessive bandwidth consumption from constant transmissions
Solution Approach 2:
Instead of transmitting complete map updates every time, the system sends only partial updates containing changes in specific sub-areas. This partial update approach maintains timeliness by transmitting changes as they occur while avoiding excessive bandwidth usage from redundant full-map transmissions
Data Source
AI summary
A map of an area can be generated describing an occupancy status for each of a plurality of sub-areas in the area. A first message including the map is transmitted. A second message is transmitted including an updated occupancy status for one or more of, and less than all, of the sub-areas.