Wireless Channel Switching via Error Counters
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Solution Overview
Problem
Existing wireless communications systems face challenges in maintaining reliable data transmission due to unpredictable channel quality, often resulting in unnecessary channel switching and decreased data transmission rates, especially in crowded ISM frequency bands.
Innovation Solution
A channel-switching method that adjusts counters to track data packet transmission errors, switching to a new channel only when the quality of the current channel becomes unacceptable, ensuring synchronized and efficient switching among all devices in the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional frequency hopping or channel-switching methods are employed with predefined time intervals and patterns, then the system can cope with unpredictable channel quality, but unnecessary channel switching occurs causing decreased data transmission rates and system stability
Solution Approach 1:
The patent implements dynamic channel switching by transitioning from static predefined hopping patterns to adaptive switching based on real-time channel quality measurements. The system continuously monitors packet error rates and adjusts switching decisions dynamically, switching channels only when quality degradation exceeds a threshold, thereby eliminating unnecessary switches while maintaining reliability.
Solution Approach 2:
The patent employs feedback mechanisms where channel quality metrics (packet error rates) are continuously measured and fed back to the switching decision logic. This feedback loop enables the system to make informed switching decisions based on actual channel conditions rather than following rigid predefined patterns, resolving the contradiction between reliability and productivity.
2Stability of the object's composition
If predefined channel hopping patterns are followed without regard to channel quality, then the system can maintain a structured switching approach, but it may return repeatedly to channels of poor quality further degrading data transmission rates
Solution Approach 1:
The system replaces static predefined hopping patterns with dynamic quality-based switching. Channel selection is no longer determined by fixed sequences but by real-time assessment of channel quality metrics, allowing the system to adapt to changing conditions and avoid repeatedly selecting poor quality channels while maintaining operational stability.
Solution Approach 2:
The patent changes the controlling parameter for channel switching from fixed time intervals and pattern indices to variable channel quality metrics. By using packet error rates and quality thresholds as the basis for switching decisions, the system can maintain stability through consistent evaluation criteria while improving productivity by avoiding poor quality channels.
3Reliability
If channel switching is performed to resolve communication interruptions, then reliable communication can be restored, but coordinated and synchronized switching among source and sinks becomes challenging without reliable communication
Solution Approach 1:
The patent introduces channel quality metrics and thresholds as intermediaries that mediate the switching decision process. Instead of requiring direct coordination between source and sinks, each device independently evaluates channel quality against predefined thresholds and makes switching decisions based on these objective criteria, simplifying the coordination problem while maintaining communication reliability.
Solution Approach 2:
The system enables each device (source and sinks) to autonomously monitor channel quality and make independent switching decisions based on locally measured packet error rates. This self-service approach eliminates the need for complex inter-device coordination protocols, as each device serves itself by making switching decisions based on its own observations of channel conditions.
Data Source
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AI summary
A wireless communications system and channel-switching method are disclosed herein. A source device and multiple sink devices independently maintain respective counters which track data packet errors. Each device independently switches channels only after its counter reaches a channel-switching threshold. The new channel switched-to is either determined by an indexed ordering of the available channels or by reference to a global clock maintained by each of the devices. Accordingly, all devices quickly arrive at a common channel. The system switches channels only when necessary and resolves quickly to a mutually acceptable channel. Therefore, unnecessary channel switching is minimized and data throughput is optimized.