Multi-RU PPDU Reception Across 80 MHz WLAN Subchannels
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Solution Overview
Problem
The existing wireless LAN systems face challenges in efficiently utilizing increased spatial streams and bandwidth due to the need for improved signaling techniques, particularly in the next-generation EHT standard (IEEE 802.11be) that supports enhanced PPDU structures and multiple RUs.
Innovation Solution
A method and apparatus for transmitting and receiving PPDU through multiple RUs, specifically aggregating 26RU and 52RU in each 20 MHz subchannel, enabling efficient data transmission and reception in an 80 MHz band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple small-RUs (26RU and 52RU) are aggregated in each 20 MHz subchannel, then transmission efficiency and throughput are improved, but device complexity and signaling requirements 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 channel conditions and traffic requirements, while the modular structure manages complexity through standardized subchannel processing.
Solution Approach 2:
The patent introduces a hierarchical dimension to resource organization: the 80 MHz band is divided into four 20 MHz subchannels (frequency dimension), and each subchannel contains multiple small-RUs (resource dimension). This multi-dimensional structure enables independent optimization of each layer, improving throughput while managing signaling complexity through hierarchical control.
2Productivity
If increased bandwidth and spatial streams are utilized, then throughput is improved, but signaling technique complexity increases
Solution Approach 1:
The increased bandwidth is segmented into multiple 20 MHz subchannels, each containing multiple small-RUs. This segmentation allows the system to utilize increased bandwidth and spatial streams while managing signaling complexity through modular, standardized subchannel structures that can be independently configured and controlled.
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.