Non-Contiguous Channel Bonding for Selective Subchannel CCA
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in channel utilization due to the inability to support non-contiguous channel bonding, leading to increased power consumption and reduced throughput when legacy devices coexist with High-Efficiency WLAN (HEW) devices, as they are limited to using only primary subchannels, resulting in unused secondary subchannels.
Innovation Solution
Implementing a non-contiguous channel bonding system that utilizes trigger-based and non-trigger-based CCA measurements to optimize subchannel usage by performing limited CCA measurements on primary and secondary subchannels, reducing power consumption and maximizing bandwidth utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If contiguous channel bonding is used to ensure continuous frequency allocation, then device compatibility with legacy standards is maintained, but bandwidth utilization efficiency deteriorates when secondary subchannels are unavailable
Solution Approach 1:
The patent segments the channel into multiple subchannels (e.g., 20 MHz subchannels within 80 MHz or 160 MHz channels) and enables independent selection and bonding of available subchannels. This allows the system to bypass unavailable subchannels and bond only the contiguous or non-contiguous subchannels that are currently available, thereby maintaining adaptability while improving bandwidth utilization efficiency.
Solution Approach 2:
The patent implements dynamic channel bonding where the set of bonded subchannels is not fixed but adapts in real-time based on availability. The system dynamically determines which subchannels to bond by performing CCA measurements and selecting from available subchannels, allowing the channel configuration to change adaptively according to current channel conditions rather than being statically predetermined.
2Measurement precision
If CCA measurements are performed on all subchannels to maximize channel availability detection, then subchannel selection accuracy is improved, but power consumption increases
Solution Approach 1:
The patent applies partial action by performing CCA measurements on only a subset of subchannels rather than all subchannels. The system performs CCA measurements on a primary subchannel and selectively measures secondary subchannels based on whether they are needed for optimal channel bonding, thereby reducing the total number of measurements and power consumption while still achieving sufficient detection accuracy for effective channel selection.
Solution Approach 2:
The patent performs preliminary CCA measurements on primary subchannels first, and based on the results, determines whether additional CCA measurements on secondary subchannels are necessary. This staged approach allows the system to make initial channel availability assessments with minimal power consumption and only perform additional measurements when truly needed to optimize channel bonding.
3Use of energy by moving object
If limited CCA measurements are performed to reduce power consumption, then energy efficiency is improved, but subchannel availability detection accuracy deteriorates
Solution Approach 1:
The patent applies local quality by performing CCA measurements with different levels of detail on different subchannels. Primary subchannels receive thorough measurement attention as they form the basis of channel bonding, while secondary subchannels receive measurements only when necessary. This differentiated measurement strategy maintains sufficient detection accuracy for effective channel bonding while reducing overall power consumption by avoiding unnecessary measurements on all subchannels.
Data Source
AI summary
This disclosure describes methods, apparatus, and systems related to non-contiguous channel bonding. A device may determine a wireless communication channel having one or more subchannels in accordance with one or more communication standards. The device may determine instructions to perform one or more clear channel assessments (CCAs) on at least one of the one or more subchannels. The device may cause to send the instructions to one or more first devices. The device may identify a frame received from at least one of the one or more first devices, wherein the frame is received on at least one available subchannel of the one or more subchannels.