Multiple RU Aggregation in 160/80+80 MHz PPDU Reception
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Solution Overview
Problem
The existing wireless LAN systems face challenges in efficiently utilizing the increased number of spatial streams and improved signaling techniques required for next-generation standards like IEEE 802.11be (EHT) due to limitations in RU configuration and aggregation.
Innovation Solution
A method and apparatus for transmitting and receiving a Physical Protocol Data Unit (PPDU) through multiple Resource Units (RUs) in an OFDMA scheme, specifically aggregating RUs of various sizes, including a 160/80+80 MHz band with a primary and secondary 80 MHz channel, to enhance transmission efficiency and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RUs of various sizes are aggregated to form multiple RU for transmitting PPDU, then transmission efficiency and throughput are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The broadband channel is segmented into multiple Resource Units (RUs) of various sizes (26, 52, 106, 242 resource blocks) that can be independently allocated and aggregated. This segmentation allows flexible configuration of multiple RU structures to match different transmission requirements, improving transmission efficiency while maintaining manageable complexity through standardized RU building blocks.
Solution Approach 2:
The system dynamically selects and aggregates different RU sizes (26, 52, 106, 242 resource blocks) based on channel conditions, user requirements, and traffic patterns. This dynamic adaptability allows the transmission system to optimize for different scenarios, achieving high transmission efficiency without requiring fixed complex configurations for all cases.
2Productivity
If increased number of spatial streams are used in next-generation WLAN standard, then throughput is improved, but signaling technique complexity increases
Solution Approach 1:
The multiple RU structure serves multiple functions simultaneously: it carries data for multiple spatial streams, provides flexible resource allocation for different users, and enables efficient channel utilization. This multi-functionality allows the system to support increased throughput through multiple spatial streams without proportionally increasing signaling complexity, as the same RU aggregation framework handles various transmission scenarios.
3Quantity of substance
If 160/80+80 MHz broadband is used with multiple RU aggregation, then transmission capacity is improved, but difficulty of detecting and measuring increases
Solution Approach 1:
The wide 160/80+80 MHz broadband is segmented into multiple smaller RUs that can be individually detected and measured. This segmentation reduces the complexity of signal processing and measurement compared to treating the entire wideband as a single channel, while still achieving high transmission capacity through the aggregation of multiple detectable units.
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.