Adaptive Channel-Switching Schedule for Wireless Interference
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Solution Overview
Problem
Wireless microphone systems used by police officers in close proximity often experience interference, leading to lost audio due to multiple transmitter-receiver pairs operating in the same physical area, which worsens when multiple patrol vehicles arrive simultaneously.
Innovation Solution
A method and system that adapt channel-switching schedules in response to detected interference by shifting future channel switches by a specified quantity of time, using an iteratively-repeated channel sequence to minimize interference during wireless transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transmitter-receiver pairs operate in the same physical area using fixed channel assignments, then each pair can maintain stable communication, but interference occurs between pairs causing audio loss
Solution Approach 1:
The patent implements dynamic channel assignment where transmitters and receivers continuously monitor interference levels and adaptively switch between multiple available channels. This transforms the static channel allocation into a dynamic system that responds to real-time interference conditions, allowing communication pairs to maintain reliability while avoiding harmful interference through automated channel selection.
Solution Approach 2:
The system changes the operational parameter of channel frequency by monitoring interference metrics and switching to alternative channels when interference thresholds are exceeded. This parameter adaptation allows the system to maintain communication quality by selecting optimal channels based on current environmental conditions rather than using fixed assignments.
2Object-affected harmful factors
If channel-switching is implemented to reduce interference, then interference between transmitter-receiver pairs decreases, but system complexity increases due to coordination requirements
Solution Approach 1:
Each transmitter-receiver pair autonomously monitors its own interference conditions and independently selects channels without requiring centralized coordination. This self-service approach reduces system complexity by eliminating the need for complex inter-pair communication protocols while still achieving interference avoidance through distributed decision-making.
Solution Approach 2:
The system incorporates feedback mechanisms where transmitters and receivers continuously monitor interference levels on current channels and use this feedback to trigger channel switching when necessary. This closed-loop control simplifies coordination by using direct feedback from interference measurements rather than requiring complex predictive coordination algorithms.
3Reliability
If adaptive channel switching is used to maintain communication quality, then audio transmission reliability improves, but time is lost during channel switching operations
Solution Approach 1:
The system performs preliminary actions by pre-scanning and identifying alternative channels that are free from interference before they are needed. By preparing backup channel options in advance and maintaining a list of available channels, the system can switch quickly when interference is detected without requiring time-consuming channel searches during critical audio transmission.
Solution Approach 2:
The channel switching mechanism is optimized to rapidly transition between channels by skipping unnecessary intermediate steps and using pre-configured channel lists. This allows the system to minimize the time spent on channel switching while still achieving reliable audio transmission by quickly moving to interference-free channels when needed.
Data Source
AI summary
In one embodiment, a method includes receiving transmission segments from at least one device over a plurality of channels pursuant to a channel-switching schedule, the channel-switching schedule comprising an iteratively-repeated channel sequence. The iteratively-repeated channel sequence comprises a plurality of channels, the channel-switching schedule specifying an assigned transmission duration for each channel. In addition, the method includes, for at least one channel of the plurality of channels, detecting interference during a time segment of the assigned transmission duration, the time segment comprising at least one of a beginning portion and an ending portion of the assigned transmission duration. Further, the method includes responsive to the detected interference, determining to shift, by a specified quantity of time, a future channel switch indicated by the iteratively-repeated channel sequence.