Wireless Module Timing Coordination for Limited-Channel Collision Control
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Solution Overview
Problem
Conventional frequency division methods in wireless communication face challenges when the number of available frequency channels is limited, leading to overlapping channels and undetected adjacent channel communication, resulting in signal collisions due to power leakage.
Innovation Solution
A wireless communication system that shifts the start timing of observation periods for monitoring total transmission time among multiple wireless modules to comply with duty limits, distributing time periods of concentrated traffic to avoid signal collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency division is used to avoid wireless interference, then signal collision is avoided, but when the number of available frequency channels is small, overlapping or adjacent channels must be used which causes power leakage and signal collision
Solution Approach 1:
The patent implements time-division-based periodic transmission by dividing the transmission opportunity into discrete time slots and assigning different wireless modules to transmit in different time slots. This periodic time-division approach allows multiple modules to share limited frequency channels without collision, as each module transmits only during its allocated time slot rather than continuously monitoring all channels.
2Ease of operation
If each wireless module performs carrier sensing only in its own channel, then channel access is simplified, but adjacent channel communication cannot be detected causing undetected signal collision
Solution Approach 1:
The patent segments the carrier sensing function by assigning each wireless module to monitor only its specifically allocated time slot and frequency channel combination, rather than requiring each module to sense all channels continuously. This segmentation reduces the sensing burden on each module while maintaining overall system reliability through centralized coordination of transmission opportunities.
Solution Approach 2:
The patent introduces a master controller as an intermediary that coordinates transmission opportunities among multiple wireless modules. The master controller allocates specific time slots and channels to each module, enabling them to perform simplified carrier sensing only in their assigned channels while the intermediary ensures that adjacent channel collisions are avoided through proper time-division scheduling.
3Productivity
If multiple wireless modules transmit simultaneously to maximize communication efficiency, then productivity is improved, but transmission failure occurs due to signal collision
Solution Approach 1:
The patent implements dynamic time-slot allocation where transmission opportunities are flexibly assigned to different wireless modules based on current communication needs and channel conditions. Rather than fixed static allocation, the system dynamically adjusts which modules transmit in which time slots, allowing maximum utilization of available channels while preventing collisions through coordinated timing control.
Data Source
AI summary
The present disclosure relates to a wireless communication device, a wireless communication method, and a wireless communication system which perform communication between a plurality of wireless modules. The wireless communication device includes: a plurality of wireless modules; and a control circuit, in which: the wireless modules have a function of performing wireless communication, a function of monitoring a total transmission time of the wireless communication per certain observation period, and a function of limiting the wireless communication when the total transmission time reaches a certain time; and the control circuit has a function of determining a different start timing of the observation period for each wireless module.