Adaptive Vehicular Beacon Messaging Period Control
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Solution Overview
Problem
Existing vehicular communication systems face challenges in managing beacon messaging periods effectively, particularly when vehicles are moving at low speeds or when there are variations in vehicular density, leading to potential traffic collisions due to inappropriate setting of beacon messaging periods.
Innovation Solution
An apparatus and method that measure packet delivery ratio (PDR) and vehicular density to adaptively manage beacon messaging periods, increasing the period when PDR is low and decreasing it when vehicular density on a specific driving lane is lower than the overall road density, using a PDR measuring unit, determining unit, messaging period managing unit, road density measuring unit, driving lane density measuring unit, and density comparing unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the beacon messaging period is set to be short to ensure real-time traffic information collection, then the information collection frequency is improved, but traffic collision of beacon messages occurs
Solution Approach 1:
The beacon messaging period is dynamically adjusted based on detected traffic conditions and packet delivery ratios. The system transitions from a static messaging period to a dynamic one that adapts to changing traffic density and communication quality, resolving the contradiction between frequent information collection and message collision avoidance
Solution Approach 2:
The system changes the messaging period parameter adaptively based on traffic conditions. When packet delivery ratio falls below a threshold or traffic density increases, the messaging period is extended to reduce collision probability, thereby adjusting the parameter to balance information freshness and transmission reliability
2Reliability
If the beacon messaging period is extended to reduce traffic collision, then message transmission reliability is improved, but real-time traffic information collection capability deteriorates
Solution Approach 1:
The system dynamically adjusts the messaging period based on real-time traffic conditions. When traffic density is low and packet delivery ratio is high, the messaging period is shortened to maintain real-time information collection capability, thus dynamically balancing reliability and information freshness
Solution Approach 2:
The messaging period parameter is changed adaptively based on detected traffic conditions. The system monitors packet delivery ratios and traffic density, then adjusts the messaging period to optimize both transmission reliability and information collection frequency for current conditions
3Productivity
If the beacon messaging period is adjusted based on overall road vehicular density, then communication efficiency is improved, but it fails to account for high density in specific areas
Solution Approach 1:
The system applies different messaging periods to different spatial locations based on local traffic density. By detecting vehicular density in specific areas rather than averaging over the entire road, the system implements local quality adaptation, allowing high-density areas to have extended messaging periods while low-density areas maintain shorter periods
Solution Approach 2:
The system segments the road into different areas with different traffic density characteristics. By dividing the communication environment into spatial segments and applying different messaging period configurations to each segment, the system achieves both overall communication efficiency and local adaptability
Data Source
AI summary
An apparatus and a method for managing beacon messaging period in a vehicular communication provide adaptive control on beacon messaging period by using packet delivery ratio (PDR) which is measured.