Aggregated Multi-RU PPDU Reception Across 160/80+80 MHz WLAN
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Solution Overview
Problem
The existing wireless LAN systems face challenges in efficiently utilizing increased spatial streams and bandwidth due to inadequate signaling techniques, particularly in the next-generation IEEE 802.11be (EHT) standard, which requires improved methods for transmitting and receiving Physical Protocol Data Units (PPDUs) through multiple Resource Units (RUs).
Innovation Solution
A method and apparatus for transmitting and receiving PPDUs through a combination of multiple RUs in an OFDMA scheme, specifically aggregating RUs of various sizes, including a 160/80+80 MHz band configuration, where the second multiple RU is allocated within the primary or secondary 80 MHz channel, and arranging the first multiple RU in a specific frequency order to enhance transmission efficiency and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple RUs of various sizes are aggregated to increase bandwidth utilization, then transmission throughput is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The 160 MHz bandwidth is segmented into two 80 MHz channels (primary and secondary), allowing flexible RU aggregation strategies for each channel. This segmentation enables the system to handle multiple RU sizes (26, 52, 106, 242 RUs) independently in each 80 MHz channel, reducing the complexity of managing all RUs as a single large block while maintaining high throughput through selective aggregation.
Solution Approach 2:
The patent implements dynamic RU allocation where the receiving STA can be configured with different RU aggregation patterns based on channel conditions and traffic requirements. The first multiple RU arrangement in the primary 80 MHz channel and the second multiple RU arrangement in the secondary 80 MHz channel can be dynamically adjusted, allowing the system to optimize throughput while adapting signaling complexity to actual needs rather than using a fixed complex structure.
2Productivity
If RUs are arranged in specific frequency order to optimize resource allocation, then transmission efficiency is improved, but measurement and detection difficulty increases
Solution Approach 1:
The patent applies different RU arrangement strategies to different frequency regions. In the primary 80 MHz channel, the first multiple RU (comprising 26, 52, and 106 RUs) is arranged with the 106 RU at the center frequency, while in the secondary 80 MHz channel, the second multiple RU (484 RU) is allocated. This local optimization allows efficient resource allocation in each frequency region while maintaining a systematic overall structure that facilitates detection and measurement.
Data Source
AI summary
Proposed are a method and device for receiving a PPDU in a wireless LAN system. Specifically, a reception STA receives a PPDU from a transmission STA through a broadband and decodes the PPDU. The PPDU includes a control field and a data field. If the broadband is a 160/80+80 MHz band that includes a primary 80 MHz channel and a secondary 80 MHz channel, the data field is received via a second multiple RU in which 484-RU and a first multiple RU are aggregated. The first multiple RU is a multiple RU in which first and second 26-RUs, 52-RUs and 106-RUs are aggregated. The second multiple RU is allocated in the primary 80 MHz channel and the secondary 80 MHz channel.