ITS Multi-Channel Scheduling for Congestion-Aware Message Delivery
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Solution Overview
Problem
Increasing ITS environments face communication congestion due to the growing number of ITS-stations and messages, leading to decreased efficiency in communication.
Innovation Solution
Implementing a system where ITS-related service messages are transmitted on a primary channel and offloaded to a secondary channel when bandwidth exceeds availability, utilizing a freshness factor to prioritize message transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the number of ITS stations and messages increases to improve communication coverage and information availability, then the completeness of traffic information is improved, but communication congestion increases and transmission efficiency deteriorates
Solution Approach 1:
The patent segments the communication system into multiple channels (primary channel and secondary channels) to distribute traffic information. Instead of transmitting all messages through a single channel, the system divides messages into different channels based on their characteristics and channel conditions, thereby reducing congestion on any single channel while maintaining complete information dissemination across the network.
2Reliability
If all ITS service messages are transmitted on the primary channel to ensure message delivery, then message delivery reliability is improved, but channel congestion increases and transmission efficiency deteriorates
Solution Approach 1:
The patent segments message transmission across multiple channels. The primary channel carries critical messages, while secondary channels handle less time-sensitive traffic information. This segmentation ensures that important messages are delivered reliably through the primary channel while preventing overall channel congestion, thus maintaining both reliability and transmission efficiency.
Solution Approach 2:
The patent applies local quality by differentiating message priorities and assigning them to different channels based on their specific requirements. Time-critical safety messages receive higher priority and are transmitted on the primary channel with guaranteed delivery, while non-critical traffic information is transmitted on secondary channels. This localized quality assurance optimizes both reliability for critical messages and overall system efficiency.
3Quantity of substance
If bandwidth is increased to accommodate more messages to improve communication capacity, then message transmission capacity is improved, but system complexity and resource requirements increase
Solution Approach 1:
Instead of increasing bandwidth in the traditional sense, the patent introduces a new dimension by utilizing secondary channels that were previously unused or underutilized. This dimensional expansion allows the system to accommodate more messages without overloading the primary channel, effectively increasing transmission capacity while avoiding the complexity and cost associated with upgrading primary channel infrastructure.
4Productivity
If message prioritization is implemented to improve transmission efficiency, then critical message delivery is improved, but system complexity increases
Solution Approach 1:
The patent implements local quality by applying different quality levels to different messages based on their priority. Critical safety messages receive high-priority treatment with guaranteed transmission on the primary channel, while non-critical traffic information is handled with lower priority on secondary channels. This localized differentiation improves transmission efficiency for critical messages without requiring complex prioritization mechanisms for all messages, thus balancing efficiency gains with system complexity.
Data Source
AI summary
The present disclosure provides techniques or mechanisms to reduce congestion or improve efficiency of intelligent transport system (ITS) congestion and multi-channel control. Some embodiments relate to multi-channel transmission of ITS-related service messages. Some embodiments relate to use of a freshness factor in scheduling ITS transmissions. Other embodiments may be described or claimed.