WLAN PHY Parameter Design for RU Duplication and Tone Repetition
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Solution Overview
Problem
Current wireless communication technologies, such as Wi-Fi, lack defined physical-layer (PHY) parameter designs for resource unit (RU) duplication and tone repetition, essential for next-generation wireless local area networks (WLANs) to achieve low coding rate and reliable transmission.
Innovation Solution
The development of PHY parameter designs involving binary convolutional coding (BCC) interleavers and low-density parity-check (LDPC) tone mappers for generating and processing RUs or MRUs, enabling RU duplication and tone repetition in the frequency domain, with specific parameters such as N sd , N col , N row , and D tm , optimized for various RU and MRU sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RU duplication and tone repetition are implemented for low coding rate and reliable transmission, then transmission reliability is improved, but PHY parameter design complexity increases due to undefined parameters
Solution Approach 1:
The patent applies parameter changes by systematically defining specific PHY layer parameters (N_sd, N_col, N_row, N_rot, D_tm, N_cbps, N_dbps) that control RU duplication and tone repetition behavior. By establishing concrete parameter values and relationships, the patent transforms the undefined complexity into manageable, standardized parameters that can be configured according to different transmission requirements, thus improving reliability without overwhelming complexity.
Solution Approach 2:
The patent segments the PHY parameter design into distinct functional components: BCC interleaver parameters (N_col, N_row, N_rot), LDPC tone mapper parameters (D_tm), and resource allocation parameters (N_sd, N_cbps, N_dbps). This segmentation allows each parameter group to be independently optimized and managed, reducing overall design complexity while maintaining transmission reliability through coordinated operation of these segmented elements.
2Reliability
If specific PHY parameters are defined for RU duplication and tone repetition, then transmission reliability is improved, but system adaptability decreases due to standardized parameter designs
Solution Approach 1:
The patent implements dynamics by establishing parameter relationships that can adapt to different RU and MRU sizes. The parameters are defined with proportional relationships (e.g., N_sd scaling with RU size, N_col and N_row adjustments based on tone repetition factors) that allow the standardized design to dynamically accommodate varying network conditions and requirements, thus maintaining both reliability and adaptability.
Solution Approach 2:
The patent creates universal parameter definitions that serve multiple functions across different WLAN scenarios. The same parameter sets (BCC interleaver, LDPC tone mapper) are designed to work across various RU sizes (26, 52, 106, 242 tones) and modulation schemes, providing a unified framework that improves reliability through standardization while maintaining versatility through scalable parameter relationships.
3Reliability
If BCC interleaver and LDPC tone mapper are used for coding spatial streams, then packet error rate performance is improved, but processing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-defining the BCC interleaver and LDPC tone mapper parameter configurations for different RU sizes and repetition factors. These parameters are established in advance through standardized relationships, so that during actual transmission, the processing follows predetermined patterns rather than requiring complex real-time calculations, thus improving reliability through robust coding while reducing processing complexity through pre-planned parameter sets.
Data Source
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AI summary
Techniques pertaining to physical-layer, PHY, parameter designs enabling resource unit, RU, duplication and tone repetition for next-generation wireless local area networks, WLANs, are described. An apparatus, e.g., station, STA, generates an RU or multi-RU, MRU, (1810). The apparatus then performs a wireless communication with the RU or MRU (1820). In generating the RU or MRU, the apparatus codes a spatial stream using a binary convolutional coding, BCC, interleaver or a low-density parity-check, LDPC, tone mapper. In performing the wireless communication, the apparatus performs the wireless communication with RU duplication or tone repetition in a frequency domain.