Distributed RU Tone Planning for Preamble-Punctured WLAN Channels
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Solution Overview
Problem
Existing wireless LAN systems face challenges in efficiently managing and optimizing transmission and reception processes to support advanced communication requirements such as high throughput, low latency, and ultra-high reliability, particularly in environments with multiple access points and complex channel configurations.
Innovation Solution
A method and device for configuring and transmitting/receiving based on a distributed resource unit (DRU) tone plan, involving the generation and allocation of multiple DRUs across multiple channels, with preamble puncturing applied to specific channel sizes to enhance communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If distributed resource units are allocated across multiple channels, then bandwidth utilization is improved, but system complexity increases
Solution Approach 1:
The patent segments the available bandwidth into multiple distributed resource units (RUs) that can be independently allocated across different channels. Each RU contains a specific set of subcarriers that are distributed而非contiguous, allowing flexible allocation to multiple users or services simultaneously. This segmentation enables improved bandwidth utilization while maintaining manageable system complexity through structured resource management.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by distributing subcarriers across the frequency domain in a non-contiguous manner. Instead of allocating contiguous frequency blocks, the system allocates distributed subcarrier sets that span across multiple frequency regions, effectively utilizing the frequency dimension more efficiently and enabling better interference management.
2Reliability
If multiple distributed resource units are configured, then transmission reliability is improved, but configuration complexity increases
Solution Approach 1:
The patent divides the transmission resource into multiple distributed RUs, each containing a specific allocation of subcarriers. This segmentation allows the system to transmit redundant or diverse data across multiple independent resource units, improving transmission reliability through diversity while maintaining clear configuration structures for each RU.
Solution Approach 2:
The patent changes the allocation parameters of resource units from traditional contiguous frequency blocks to distributed subcarrier patterns. By modifying the allocation parameters to specify distributed subcarrier indices and patterns, the system achieves improved reliability through frequency diversity while managing configuration complexity through standardized parameter definitions.
3Object-generated harmful factors
If preamble puncturing is applied to specific channels, then interference is reduced, but channel utilization decreases
Solution Approach 1:
The patent extracts or removes the preamble from specific channels or frequency regions where interference is detected or expected. By applying preamble puncturing selectively to affected channels while maintaining normal transmission in other channels, the system reduces interference impacts on vulnerable signals while preserving overall channel utilization across the available bandwidth.
Solution Approach 2:
The patent applies different transmission qualities to different frequency regions or channels. In regions where interference is problematic, the preamble is punctured or modified to improve robustness. In regions where conditions are good, full preamble transmission is maintained. This local differentiation optimizes the balance between interference reduction and channel utilization.
Data Source
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AI summary
Disclosed are a method and device for transmission or reception based on a distributed resource unit tone plan in a wireless LAN system. A method performed by a first station (STA) in a wireless local area network (WLAN) system according to one embodiment of the present disclosure comprises the steps of: generating a PPDU including one or more fields mapped to multiple DRUs composed of N (N>1) DRUs; and transmitting the PPDU to one or more second STAs on M (M>1) channels excluding channels of a specific size in a bandwidth on the basis of the application of preamble puncturing to the channels of the specific size. Here, each of the N DRUs includes a plurality of subcarriers distributed in the frequency domain, and the N DRUs can be allocated one by one to N channels among the M channels.