Intelligent Channel Selection Using Frequency Offset and Power
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Solution Overview
Problem
Existing channel selection methods in wireless communication systems, particularly in the ISM band, fail to effectively consider frequency offsets, leading to increased minimum detectable signal and power consumption due to interference from strong neighboring channels.
Innovation Solution
An intelligent channel selection apparatus and method that measures received signal channel power and frequency offsets, generating data for channel selection using a Channel Selection Assignment Matrix (CSAM) to prioritize channels, thereby reducing the influence of interferers and optimizing channel assignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel selection is based solely on signal channel power (RSSI), then the selection process is simple and fast, but the minimum detectable signal increases and power consumption increases due to unaccounted frequency offset interference
Solution Approach 1:
The patent changes the parameter basis from solely signal channel power to a composite metric that includes both signal channel power and frequency offset information. By introducing frequency offset as an additional parameter in the channel selection decision, the system achieves more accurate interference assessment without significantly increasing computational complexity, thus resolving the contradiction between selection speed and energy efficiency.
2Device complexity
If channel selection does not consider frequency offsets, then the selection process is simpler, but interference from neighboring channels increases due to unaccounted frequency deviations
Solution Approach 1:
The patent introduces frequency offset information as an intermediary factor that mediates between the signal channel power measurement and the final channel selection decision. This intermediary parameter allows the system to account for frequency deviations caused by neighboring channels without fundamentally changing the simplicity of the selection process, thus reducing harmful interference while maintaining algorithmic simplicity.
3Speed
If dynamic channel selection is performed without considering frequency offsets, then the system responds faster to channel conditions, but the minimum detectable signal increases due to unaccounted inter-modulation distortion
Solution Approach 1:
The patent applies partial action by incorporating frequency offset consideration only when necessary or when the frequency offset exceeds a certain threshold, rather than always performing complex frequency-offset-aware selection. This partial application maintains fast response speed for typical conditions while providing enhanced measurement precision when frequency offset effects are significant, thus resolving the contradiction between speed and precision.
Data Source
AI summary
Disclosed herein is an intelligent channel selection apparatus and method against various interferers in wireless communication systems, and a receiver using the same. The intelligent channel selection apparatus includes a channel power measurement unit, a channel list storage unit, a channel selection data generation unit and a channel selection unit. The channel power measurement unit measures received signal channel power of a plurality of available channels and storing the received signal channel power as channel power data. The channel list storage unit arranges the plurality of available channels and storing the plurality of available channels in a channel list. The channel selection data generation unit generates data for channel selection based on the signal channel power data and the frequency offsets of the channels of the channel list. The channel selection unit selects the highest priority channel from the channel list based on the data for channel selection.