Multi-RU LDPC Tone Mapping for Higher WLAN Throughput
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Solution Overview
Problem
Existing wireless LAN systems face challenges in optimizing data throughput due to the increased number of spatial streams, requiring improved signaling techniques for efficient data transmission.
Innovation Solution
Implementing LDPC tone mapping parameters for Multi-RU to enhance frequency diversity, optimizing data tones for improved throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of spatial streams is increased to improve throughput, then data transmission capacity is improved, but system complexity and signaling overhead increase
Solution Approach 1:
The patent applies parameter changes by modifying the tone mapping parameters specifically for LDPC-coded multi-RU allocations. By changing the tone mapping parameters (such as tone spacing, mapping pattern, or resource element allocation) to be adapted to multi-RU structures, the system enables efficient utilization of increased spatial streams without requiring proportional increases in signaling overhead. This parameter adaptation allows the system to handle higher throughput requirements while maintaining manageable complexity levels.
2Productivity
If LDPC tone mapping is applied to Multi-RU to optimize frequency diversity, then overall throughput increases, but processing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the multi-RU allocation into separate tone mapping processes for each RU. Instead of applying a single complex tone mapping across all RUs simultaneously, the system segments the tone mapping operation to be performed individually on each resource unit. This segmentation reduces the overall processing complexity while still achieving the frequency diversity benefits across the entire multi-RU allocation, as each segment contributes to the overall throughput optimization.
Data Source
Figure 1(a)~1(b)
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AI summary
Presented are a method by which a multi-RU receives a LDPC-tone-mapped PPDU in a wireless LAN system, and an apparatus. Particularly, a reception STA receives, from a transmission STA, a PPDU including a data field and decodes the data field. The data field is received through the multi-RU. LDPC tone mapping for data tone included in the data field is performed on the basis of a first parameter with respect to the multi-RU. The first parameter is 18 when the multi-RU is an RU in which the 242 tone RU and the 484 tone RU are aggregated.