Dynamic Subband Channel Switching for Mixed-Bandwidth Wi-Fi
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Solution Overview
Problem
The mismatch in bandwidth capabilities between access points (APs) and non-AP devices, such as client devices, results in wastage of bandwidth due to hardware limitations, leading to inefficient resource utilization and suboptimal system performance.
Innovation Solution
Implementing Dynamic Subband Operation (DSO) that allows access points to dynamically allocate client devices to primary or secondary channels based on bandwidth availability and quality of service parameters, enabling efficient bandwidth utilization and resource aggregation using MU-MIMO.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If access points operate with wider bandwidth capabilities, then system performance and throughput are improved, but bandwidth wastage occurs when interacting with non-AP devices of narrower bandwidth
Solution Approach 1:
The patent implements dynamic subband operation where the access point can dynamically switch between operating on the full wider bandwidth or on a reduced subband matching the non-AP device capabilities. This dynamic adaptation allows the AP to optimize bandwidth utilization based on the connected device's capabilities, preventing bandwidth wastage while maintaining high performance when possible.
Solution Approach 2:
The access point changes its operating bandwidth parameter based on the connected non-AP device's capabilities. When a narrowband device is detected, the AP transitions from wider bandwidth operation to subband operation at the narrower bandwidth, thereby eliminating bandwidth wastage while preserving system performance for that particular connection.
2Productivity
If access points dynamically allocate client devices to different channels, then resource utilization is improved, but system complexity increases
Solution Approach 1:
The patent divides the wider bandwidth into subbands that can be independently allocated to different client devices. This segmentation allows the access point to match each device's bandwidth capabilities with an appropriate subband, improving resource utilization while managing complexity through structured bandwidth division.
Solution Approach 2:
The access point is designed with multi-functional capability to operate in multiple bandwidth modes (wider bandwidth and subband modes). This universal design allows a single AP to serve both wideband and narrowband devices efficiently, improving overall resource utilization without requiring separate hardware for different device types.
Data Source
AI summary
Systems, devices, methods, and computer-readable storage media of channel switching. One device for channel switching includes a memory and at least one processor. The at least one processor is configured to communicatively couple with one or more client devices, using one of a primary bandwidth channel or a secondary bandwidth channel and transmit a first trigger on at least the primary bandwidth channel to at least a first client device of the one or more client devices based on at least one of (i) a bandwidth availability (ii) a quality of service parameter, or (iii) a secondary bandwidth switching capability, wherein the first client device switches from the primary bandwidth channel to the secondary bandwidth channel in response to the first trigger.