Wireless Communication Channel Selection for Radio Interference
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Solution Overview
Problem
Existing communication systems that use the same frequency band for wireless LAN and digital codeless telephone (DCL) face significant radio interference, leading to communication errors and poor quality, as most wireless channels are stopped due to interference, affecting the ability to conduct reliable wireless communications.
Innovation Solution
A communication system with a main unit and a subunit that detects the use state of wireless channels, selects channels with less radio wave interaction, and determines specific channels for use, minimizing interference by excluding channels with strong radio wave strength, particularly those near the center of the band, to ensure reliable communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the same frequency band is used for both wireless LAN and DCL communications, then the frequency band utilization is improved, but radio interference between the two systems occurs
Solution Approach 1:
The patent segments the 2.4 GHz frequency band into multiple channels (14 wireless LAN channels and 89 DCL channels). By dividing the shared frequency band into distinct channels, the system allows both wireless LAN and DCL to operate simultaneously while reducing interference through channel selection and frequency hopping mechanisms.
2Reliability
If wireless channels are stopped due to radio interference, then communication errors are reduced, but the number of available channels decreases
Solution Approach 1:
The patent implements dynamic channel selection where the DCL system continuously monitors radio interference levels and adapts its channel usage in real-time. Through frequency hopping and selective channel activation, the system dynamically adjusts which channels are active based on current interference conditions, maintaining reliability while maximizing channel utilization.
3Reliability
If channel selection is performed to avoid interference, then communication quality is improved, but system complexity increases
Solution Approach 1:
The patent employs feedback mechanisms where the DCL system monitors radio interference levels on various channels and uses this information to make informed channel selection decisions. The system continuously receives feedback about channel quality and adjusts its frequency hopping sequence and channel activation accordingly, achieving high communication quality through adaptive decision-making.
Data Source
AI summary
A communication system includes a main communication unit, a subcommunication unit that communicates with the main communication unit by using first wireless channels, and an external communication unit that communicates with the main communication unit by using second wireless channels. The subcommunication unit includes a state detection unit that detects a use state of the second wireless channels. The main communication unit includes a state acquisition unit that acquires the use state of the second wireless channels, a selection unit that selects a predetermined number of the first wireless channels with the less effect of radio wave interaction in the wireless communications based on the use state, a channel determination unit that determines one of the predetermined number of the first wireless channels, and a first wireless communication unit that communicates with the subcommunication unit using the one of the predetermined number of the first wireless channels.