Wi-Fi Preamble Puncturing for Dynamic Adjacent Bandwidth Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing Wi-Fi standards face inefficiencies in bandwidth allocation as the demand for higher bandwidth exceeds the available capacity in individual subchannels, particularly when incumbent devices occupy portions of the subchannels, leading to interference and suboptimal channel utilization.
Innovation Solution
Implementing preamble puncturing to dynamically reallocate bandwidth from adjacent subchannels based on signal quality metrics, adjusting the bandwidth size to meet the requirements of client devices while minimizing interference with incumbent devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bandwidth is allocated from adjacent subchannels using preamble puncturing, then channel efficiency and bandwidth utilization are improved, but interference with incumbent devices may increase
Solution Approach 1:
The patent applies local quality by selectively applying preamble puncturing only to specific subchannels where incumbent devices are detected, rather than uniformly across all subchannels. The access point monitors each subchannel for incumbent device presence and dynamically adjusts bandwidth allocation accordingly, allowing high bandwidth utilization in clean subchannels while protecting subchannels with incumbent devices from interference
Solution Approach 2:
The patent implements dynamics through continuous monitoring of subchannels for incumbent device presence and dynamic adjustment of bandwidth allocation. The access point can change the bandwidth allocation in real-time based on detected incumbent device activity, transitioning between different bandwidth configurations to optimize channel efficiency while preventing interference as conditions change
2Quantity of substance
If bandwidth is dynamically reallocated to meet client device requirements, then bandwidth sufficiency for client devices is improved, but channel utilization optimization becomes more complex
Solution Approach 1:
The patent applies preliminary action by having client devices indicate their bandwidth requirements before bandwidth allocation is finalized. The access point receives bandwidth requirement indications from client devices and uses this information to pre-plan bandwidth allocation strategies, including determining when to apply preamble puncturing to adjacent subchannels, thereby simplifying the allocation process
Solution Approach 2:
The patent implements feedback through a monitoring and adjustment loop where the access point continuously monitors subchannel conditions, detects incumbent device presence, and adjusts bandwidth allocation accordingly. Client devices provide feedback about their bandwidth requirements, and the access point uses this feedback along with incumbent device detection results to dynamically optimize bandwidth distribution
Data Source
AI summary
An example wireless networking device (e.g., Access point) dynamically managing preamble puncturing for OFDM-based communications. The wireless networking device determines first criteria of a signal quality and further determines to allow preamble puncturing, wherein the signal quality of the determines the occupancy of a subchannel. Based on the determination to preamble puncture, apply dynamically, preamble puncturing to an adjacent subchannel. The wireless networking device further monitors the subchannel signal quality and determines based on a second criteria, an amount of bandwidth useable from an adjacent bandwidth. The wireless networking device, based on the second criteria, dynamically allocate bandwidth from the adjacent subchannel.