Nested RU Tone Plans for 240–640 MHz WLAN Bandwidths
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Solution Overview
Problem
Current designs for RU tone plans in next-generation WLANs do not support wider bandwidths such as 240 MHz, 480 MHz, and 640 MHz, limiting throughput capabilities.
Innovation Solution
A method for generating subcarrier indices of RU tone plans for bandwidths greater than 80 MHz using a formula with a subcarrier spacing of 78.125 kHz, allowing for the creation of RU tone plans for 240 MHz, 480 MHz, and 640 MHz by puncturing contiguous bandwidths from larger bandwidths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wider bandwidths (240 MHz, 480 MHz, 640 MHz) are used to achieve higher throughputs, then throughput capability is improved, but RU tone plan design complexity increases because no standardized designs exist for these bandwidths
Solution Approach 1:
The patent segments the wide bandwidth (240, 480, or 640 MHz) into multiple 80 MHz sub-bandwidths. Each sub-bandwidth is assigned a standardized RU tone plan, which simplifies the overall design by reusing proven 80 MHz configurations rather than creating entirely new tone plans for wide bandwidths.
Solution Approach 2:
The patent implements a nested structure where multiple 80 MHz tone plans are nested within a single wide bandwidth configuration. The resource units in each 80 MHz sub-bandwidth are organized hierarchically, with subcarrier indices generated by combining the sub-bandwidth index with the standardized 80 MHz tone plan indices.
2Adaptability or versatility
If a standardized RU tone plan is designed for each wide bandwidth (240, 480, 640 MHz), then adaptability is improved, but device complexity increases due to the need to manage multiple bandwidth configurations
Solution Approach 1:
The patent creates a universal RU tone plan design that works across multiple wide bandwidths (240, 480, and 640 MHz) by using the same fundamental approach: dividing the total bandwidth into 80 MHz sub-bandwidths and applying standardized tone plans to each. This multi-functional design allows a single methodology to serve multiple bandwidth scenarios.
Solution Approach 2:
The patent changes the parameter of bandwidth width while maintaining the same structural approach. By adjusting the number of 80 MHz sub-bandwidths (3 for 240 MHz, 6 for 480 MHz, 8 for 640 MHz), the system adapts to different bandwidth requirements without changing the underlying tone plan design methodology.
Data Source
AI summary
Techniques pertaining to wide bandwidth resource unit (RU) tone plan designs for next-generation wireless local area networks (WLANs) are described. An apparatus (e.g., station (STA)) generates subcarrier indices of a RU tone plan for a wide bandwidth greater than 80 MHz with a subcarrier spacing (SCS) of 78.125 kHz by using a formula. The apparatus then communicates wirelessly in the wide bandwidth.