26-Tone DRU Mapping Across 80 MHz WLAN Channels
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Solution Overview
Problem
Existing wireless LAN systems face challenges in providing advanced communication environments with high throughput, low latency, and ultra-high reliability, particularly in supporting distributed resource unit tone plans for efficient bandwidth utilization and multiple access points.
Innovation Solution
A method and device that utilize a distributed resource unit (DRU) tone plan in WLAN systems, involving the generation of a physical layer protocol data unit (PPDU) and transmission/reception of a bandwidth including a 80MHz channel, with 26-tone DRU defined as every 36th subcarrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If distributed resource unit tone plan is implemented, then bandwidth utilization efficiency is improved, but system complexity increases
Solution Approach 1:
The 80MHz bandwidth is segmented into multiple 20MHz channels, each with its own 26-tone DRU structure. This segmentation allows independent optimization of each channel while maintaining overall bandwidth efficiency, resolving the contradiction by breaking down the complex 80MHz resource allocation into manageable 20MHz units.
Solution Approach 2:
The patent defines specific parameter configurations for 26-tone DRUs including subcarrier spacing, tone allocation patterns, and resource unit indexing. By standardizing these parameters across multiple 20MHz channels, the system achieves efficient bandwidth utilization while maintaining manageable complexity through parameter repetition and reuse.
2Adaptability or versatility
If multiple 26-tone DRUs are defined across 80MHz bandwidth, then resource allocation flexibility is improved, but signal processing complexity increases
Solution Approach 1:
The 80MHz bandwidth is divided into four 20MHz channels, each containing multiple 26-tone DRUs. This segmentation provides flexible resource allocation at the channel level while keeping signal processing complexity manageable by limiting the number of tones processed simultaneously in each 20MHz segment.
Solution Approach 2:
Each 20MHz channel has its own localized 26-tone DRU structure with specific subcarrier allocations. This local quality approach allows independent optimization and processing of each channel segment, improving overall resource allocation flexibility while maintaining consistent processing complexity across different channels.
Data Source
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AI summary
Disclosed are a transmission or reception method and device based on a distributed resource unit tone plan in a wireless LAN system. A method performed by a first station (STA) in a wireless local area network (WLAN) system, according to one embodiment of the present disclosure, may comprise the steps of: generating a physical layer protocol data unit (PPDU) including one or more fields, wherein the one or more fields are mapped onto one or more distributed resource units (DRUs); and transmitting the PPDU to one or more second STAs on a bandwidth including an 80 MHz channel. On the basis of the one or more DRUs comprising a 26-tone DRU, the 26-tone DRU is one of 36 predetermined 26-tone DRUs, wherein the nth (n = 1, 2, ..., 36) 26-tone DRU may be defined as every 36th subcarrier including the nth lowest subcarrier among available subcarriers in the 20 MHz channel.