Interleaving Method for OFDMA Frequency Diversity
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Solution Overview
Problem
In OFDMA EHT PPDU transmission, stations with large-bandwidth protocols experience limited frequency diversity gain due to restricted resource unit allocation, hindering efficient data transmission across multiple stations.
Innovation Solution
An interleaving method that divides bandwidth into physical resource units based on specified granularities, such as 26 or 52 tones, and maps these units into virtual or logical resource units, enhancing frequency diversity by adjusting data and pilot tone allocations while maintaining compatibility with existing protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resource units are allocated to multiple stations in large-bandwidth OFDMA EHT PPDU transmission, then transmission efficiency is improved, but frequency diversity gain is limited due to restricted resource unit allocation
Solution Approach 1:
The bandwidth is divided into multiple resource units (RUs) of different sizes (26-tone, 52-tone, 106-tone, 242-tone, 484-tone, 996-tone RUs) that can be independently allocated to different stations. This segmentation allows the system to distribute data across multiple frequency resources while maintaining the ability to provide frequency diversity by spreading allocations across non-contiguous RUs.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by defining resource units at multiple granularity levels (from 26-tone to 996-tone RUs). This multi-granularity approach enables flexible allocation strategies that can optimize both transmission efficiency (by allocating larger RUs to stations needing high throughput) and frequency diversity (by distributing smaller RUs across the bandwidth to multiple stations).
Data Source
AI summary
An interleaving method includes: interleaving, by a first device, an RU according to first information, where the first information includes at least one of a bandwidth, an interleaving granularity or RU allocation information.