Multi-RU Interleaving and Tone Mapping for Joint WLAN Encoding
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Solution Overview
Problem
Current wireless communication technologies face challenges in efficiently encoding and processing information for multi-resource unit (multi-RU) operations, particularly in implementing binary convolutional codes (BCC) interleavers and low-density parity-check (LDPC) tone mappers for improved spectrum utilization and frequency diversity in next-generation wireless local area networks (WLANs).
Innovation Solution
The proposed solution involves joint encoding schemes with interleavers and tone mappers for multi-RU operations, where information bits are processed through interleaving and tone mapping on either an aggregate-RU or individual-RU basis, using BCC interleavers and LDPC tone mappers, to generate processed bit sequences for transmission across multiple RUs, leveraging parameters defined in IEEE 802.11ax specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If joint encoding schemes with interleaver and tone mapper are implemented for multi-RU operations, then spectrum utilization and link quality are enhanced, but device complexity increases due to the need for coordinated processing across multiple resource units
Solution Approach 1:
The patent divides the multi-RU encoding process into distinct functional segments: an interleaver that processes encoded bit sequences to distribute bits across RUs, and a tone mapper that maps tones to specific subcarriers. This segmentation allows each component to be optimized independently while working together to achieve improved link quality across multiple resource units.
Solution Approach 2:
The patent develops universal interleaver and tone mapper designs that can operate across different RU configurations and sizes. The interleaver handles variable-length encoded sequences, and the tone mapper adapts to different subcarrier allocations, providing a flexible framework that works for multi-RU operations regardless of specific deployment scenarios.
2Reliability
If encoded bit sequences are interleaved and tone mapped across multiple RUs, then frequency diversity is improved, but processing time increases due to the additional interleaving and mapping steps
Solution Approach 1:
The patent applies the interleaver to encoded bit sequences before tone mapping, performing the bit distribution operation in advance. This preliminary interleaving ensures that frequency diversity is established early in the processing chain, allowing subsequent tone mapping to proceed more efficiently without reprocessing the same bits multiple times.
3Adaptability or versatility
If separate interleavers and tone mappers are used for each RU, then processing flexibility is improved, but device complexity increases due to multiple independent processing chains
Solution Approach 1:
The patent combines the interleaving and tone mapping functions into an integrated processing framework where a single interleaver output feeds into a single tone mapper that then distributes to multiple RUs. This merging reduces the number of independent processing chains while maintaining the ability to handle different RU configurations through flexible parameter settings rather than duplicate hardware.
Data Source
AI summary
A method of joint encoding schemes with interleaver and tone mapper for multiple-resource unit (multi-RU) operation involves performing joint encoding of a plurality of information bits to generate a plurality of encoded bit sequences. The method also involves processing the plurality of encoded bit sequences by interleaving and tone mapping the encoded bit sequences with respect to a plurality of resource units (RUs) on either or both of an aggregate-RU basis and an individual-RU basis to generate a plurality of processed bit sequences. The method further involves transmitting the plurality of processed bit sequences over the plurality of RUs.