Adaptive Channel Timing for Vehicular Wireless Communication
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Solution Overview
Problem
Existing wireless discontinuous channel systems, such as DSRC and WAVE, do not dynamically adjust resource allocation based on actual system utilization, leading to inefficient channel resource usage and suboptimal performance in vehicular communication systems.
Innovation Solution
The system adapts channel timing by evaluating and calculating optimal CSI channel duty cycles and switch timings based on channel utilization, broadcasting these adjustments, and transmitting data during optimized intervals to maximize throughput and minimize latency for high-priority traffic while maintaining acceptable performance for lower-priority traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant channel intervals are used for CSI and service channels, then guaranteed grade of service is provided, but channel resource utilization is inefficient
Solution Approach 1:
The patent applies dynamics by transitioning from constant channel intervals to adaptive intervals that dynamically adjust based on actual traffic conditions. The system monitors CSI channel traffic and service channel traffic separately, and adjusts the interval durations accordingly to optimize both reliability and resource utilization.
Solution Approach 2:
The patent changes the parameter of channel interval duration from fixed to variable. By allowing the CSI channel interval and service channel interval to change based on traffic load conditions, the system achieves efficient resource allocation while maintaining guaranteed service for critical messages.
2Loss of time
If CSI channel interval is increased to reduce latency for emergency messages, then throughput for critical traffic improves, but service channel resources are underutilized
Solution Approach 1:
The patent applies local quality by providing different interval characteristics to different channels based on their specific traffic needs. The CSI channel receives a longer interval to minimize latency for emergency messages, while the service channel receives a shorter interval to maximize resource utilization, as each channel has different quality requirements.
Solution Approach 2:
The system dynamically adjusts the CSI channel interval based on actual emergency message traffic conditions. When emergency traffic is high, the interval is extended to reduce latency; when traffic is low, the interval is reduced to allow more frequent service channel access, optimizing both objectives simultaneously.
3Productivity
If service channel interval is decreased to increase resource utilization, then channel efficiency improves, but latency for data exchange increases
Solution Approach 1:
The patent applies local quality by tailoring the service channel interval to the specific needs of data exchange traffic. By monitoring service channel traffic patterns, the system adjusts the interval to balance resource utilization with acceptable latency for non-critical data exchange applications.
Data Source
AI summary
A system and method for data transmission on wireless discontinuous channels including a control/safety information (CSI) channel having a duty cycle, and a plurality of service channels. The system and method include: evaluating channel utilization of one or more of the channels; calculating an optimal CSI channel duty cycle responsive to the channel utilizations; adjusting the duty cycle of the CSI channel to the calculated optimal CSI channel duty cycle; broadcasting the optimal CSI channel duty cycle; and transmitting data during the optimal CSI channel duty cycle.