Wireless Resource Allocation via Tone Shifting in WLAN
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Solution Overview
Problem
Current wireless LAN systems face challenges in efficiently allocating bandwidth resources, particularly in dense environments with multiple access points and stations, leading to interference and limited throughput, especially in scenarios like smart homes, stadiums, and outdoor settings where spectrum efficiency and area throughput need improvement.
Innovation Solution
The method involves an access point determining and scheduling resource units of different sizes in various bandwidths, with the allocation start positions of resource units and guard tones configured to minimize interference through tone shifting, allowing for efficient resource allocation across different bandwidths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If resource units are allocated in different bandwidths without tone shifting, then allocation simplicity is maintained, but interference occurs among stations operating in different bandwidths
Solution Approach 1:
The patent applies parameter changes by introducing tone shifting as a modification to the resource allocation parameters. Specifically, it adjusts the starting tone positions and resource unit configurations based on bandwidth size, transforming the allocation parameters dynamically to prevent interference while maintaining manageable complexity through standardized shift patterns.
Solution Approach 2:
The patent implements local quality by configuring different resource allocation parameters for different bandwidth regions. Stations operating in different bandwidths receive locally optimized resource unit allocations with specific tone shifts applied to their respective regions, allowing interference mitigation tailored to each bandwidth's specific characteristics rather than applying a uniform approach.
2Productivity
If spectrum efficiency is improved through better resource allocation, then area throughput increases, but system complexity in managing different bandwidths increases
Solution Approach 1:
The patent achieves universality by creating a resource allocation framework that functions across multiple bandwidth sizes (20 MHz, 40 MHz, 80 MHz, 160 MHz) using a common set of principles and parameters. The same tone shifting and resource unit configuration methods apply universally across different bandwidth scenarios, enabling improved area throughput without proportionally increasing management complexity.
3Object-affected harmful factors
If guard tones are allocated with different start positions for different bandwidths, then interference is reduced, but resource allocation precision requirements increase
Solution Approach 1:
The patent applies segmentation by dividing the frequency spectrum into distinct resource units with clearly defined boundaries and guard tones. Each bandwidth is segmented into manageable resource blocks with precise start positions, allowing interference mitigation through structured segmentation rather than requiring continuous precise allocation across the entire spectrum.
Data Source
AI summary
Disclosed are a method and a device for allocating wireless resources in bandwidths of different sizes in a wireless LAN. The method for allocating wireless resources in bandwidths of different sizes in a wireless LAN may comprise steps in which: an AP determines a first resource unit to be allocated to an STA in a first bandwidth; and the AP schedules the first resource unit for the STA, wherein the allocation starting position of the first resource unit allocated in the first bandwidth is configured the same as the allocation starting position of a second resource unit allocated in a second bandwidth, and the allocation starting position of a first guard tone adjacent to the first resource unit may be configured differently from the allocation starting position of a second guard tone adjacent to the second resource unit on the basis of tone shifting.