Distributed Tone Mapping for Multi-RU Frequency Diversity
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Solution Overview
Problem
Existing communication systems allocate a limited bandwidth to each station (STA) using resource units (RUs), limiting the frequency diversity gain and failing to utilize the full bandwidth potential, especially in scenarios with punctured channels.
Innovation Solution
Perform distributed tone mapping on physical tone indexes within different PPDU bandwidths, considering the mapping location of special tones and punctured channels to construct logical RUs and MRUs, enhancing bandwidth utilization and frequency diversity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If one RU or MRU is allocated to one station (STA) by using an RU/MRU allocation mode, then each STA obtains a limited bandwidth, but the frequency diversity gain is limited and the full bandwidth potential is not utilized
Solution Approach 1:
The patent segments the frequency spectrum into multiple RUs of different sizes (26-tone, 52-tone, 106-tone, 242-tone RUs) and allows a single STA to be allocated multiple non-contiguous RUs across different frequency ranges. This segmentation enables the STA to access broader bandwidth while maintaining frequency diversity by distributing resources across separated frequency segments rather than providing one large contiguous block.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by enabling multi-RU assignments that span multiple frequency blocks. Instead of allocating resources within a single frequency dimension, the system allocates across multiple dispersed frequency dimensions, allowing STAs to utilize scattered spectrum resources efficiently and achieve both wide bandwidth access and frequency diversity simultaneously.
2Productivity
If distributed tone mapping is performed to allow stations to access broader bandwidth, then bandwidth utilization improves, but the system complexity increases due to punctured channel considerations
Solution Approach 1:
The patent performs preliminary tone mapping operations before data transmission, where the system pre-calculates and establishes the mapping relationships between logical RUs and physical subcarriers, taking into account punctured channel configurations in advance. This preliminary action simplifies the transmission process by resolving complex mapping issues before they arise during actual data communication.
Solution Approach 2:
The patent dynamically adjusts tone mapping parameters based on channel conditions and punctured configurations. By changing mapping parameters such as RU size, frequency location, and subcarrier allocation according to real-time channel state, the system achieves high bandwidth utilization while managing complexity through adaptive parameter optimization rather than fixed complex structures.
Data Source
AI summary
The communication method includes performing distributed tone mapping on a first resource unit (RU). In the communication method, a frequency diversity gain is improved by performing distributed tone mapping on an RU.