PPDU Reception Across Aggregated RUs in 80 MHz WLAN Channels
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Solution Overview
Problem
Existing wireless LAN systems face challenges in efficiently utilizing increased spatial streams and bandwidth due to the need for improved signaling techniques, particularly in next-generation standards like IEEE 802.11be (EHT) that support enhanced PHY layer protocols and multiple RUs.
Innovation Solution
A method and apparatus for transmitting and receiving Physical Protocol Data Units (PPDUs) through multiple RUs, specifically aggregating 26RU and 52RU in each 20 MHz subchannel, enabling efficient data transmission and reception in 80 MHz bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If small-RUs (26RU and 52RU) are aggregated in each 20 MHz subchannel, then transmission efficiency and throughput are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The 80 MHz band is segmented into four 20 MHz subchannels, and each subchannel is further segmented into multiple small-RUs (26RU and 52RU). This segmentation allows flexible resource allocation and improves transmission efficiency by matching RU sizes to specific traffic requirements, while the structured segmentation approach helps manage complexity through standardized patterns.
Solution Approach 2:
The patent introduces dynamic RU aggregation where the number and size of RUs per 20 MHz subchannel can be flexibly configured based on traffic conditions. The receiving STA is capable of receiving PPDUs through variable numbers of RUs (e.g., 2-9 RUs per subchannel), allowing the system to adapt resource allocation dynamically while maintaining manageable complexity through predefined aggregation patterns.
2Productivity
If multiple RUs are aggregated for data transmission, then data rates are increased, but the signaling technique needs improvement to properly utilize increased spatial streams
Solution Approach 1:
The patent extends resource allocation from traditional single-RU transmission to multi-RU aggregation across multiple dimensions: frequency (multiple 20 MHz subchannels), spatial (multiple spatial streams), and hierarchical (aggregated RUs within subchannels). This multi-dimensional approach enables higher data rates by充分利用 increased spatial streams while the hierarchical structure provides a systematic framework for signaling management.
Solution Approach 2:
The patent creates a universal signaling framework that can accommodate various RU aggregation configurations (different numbers of 26RU and 52RU per subchannel, different total RU counts from 2-9 per subchannel). This universal approach allows the same basic signaling mechanism to handle diverse transmission scenarios, reducing the need for separate signaling techniques for each configuration.
Data Source
AI summary
Proposed are a method and a device for receiving a PPDU in a wireless LAN system. Specifically, a receiving STA receives a PPDU from a transmitting STA through a first band, and decodes the PPDU. The PPDU comprises a control field and a data field. When the first band is an 80 MHz band comprising first to fourth 20 MHz subchannels, the first 20 MHz subchannel comprises first multiple RUs in which a first 26RU and a first 52RU are aggregated. The first 26RU is an RU located in the middle of the first 20 MHz subchannel. The first 52RU is an RU having a frequency lower than that of the first 26RU, and which is adjacent to the first 26RU.