Multiple-RU PPDU Reception in 320 MHz WLAN Preamble Puncturing
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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 next-generation standards like IEEE 802.11be (EHT) that support enhanced PPDU structures and multiple RUs.
Innovation Solution
A method and apparatus for transmitting and receiving PPDUs through multiple RUs, specifically using large-RUs configured by aggregating 996 and 484 tone RUs within a 320/160+160 MHz band, supporting preamble puncturing and OFDMA aggregation to enhance transmission efficiency and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple RUs are aggregated to increase bandwidth utilization, then transmission efficiency and throughput are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent segments the broadband into multiple RUs (Resource Units) of different sizes (26, 52, 106, 242, 484, 996 tones) that can be independently allocated and aggregated. This segmentation allows flexible combination of RUs to match different bandwidth requirements while maintaining manageable complexity through standardized RU definitions.
Solution Approach 2:
The patent implements dynamic RU allocation where the number, size, and positioning of RUs can be adjusted based on channel conditions and traffic requirements. The receiving STA can be configured to monitor multiple RUs with varying parameters, enabling adaptive optimization of transmission efficiency without fixed rigid structures.
2Productivity
If increased number of spatial streams are used to enhance throughput, then transmission capacity is improved, but signaling technique complexity increases
Solution Approach 1:
The patent combines OFDMA (Orthogonal Frequency Division Multiple Access) with MU-MIMO (Multi-User Multiple Input Multiple Output) to simultaneously utilize frequency division and spatial multiplexing. This merging of access techniques allows multiple spatial streams to be transmitted across multiple RUs, achieving enhanced throughput while sharing the signaling framework between the two technologies.
Solution Approach 2:
The patent creates a universal signaling framework that handles both OFDMA resource allocation and MU-MIMO spatial stream management through integrated RU configuration. The same RU allocation mechanisms serve dual purposes of frequency resource assignment and spatial stream mapping, reducing overall signaling complexity despite increased capability.
3Productivity
If large-RU aggregation is implemented to utilize 320/160+160 MHz bandwidth, then transmission efficiency is improved, but difficulty of detecting and measuring increases
Solution Approach 1:
The patent performs preliminary configuration of RU parameters including tone allocation, positioning, and aggregation patterns before actual data transmission. The receiving STA is pre-configured with RU detection parameters and measurement criteria, enabling efficient detection of aggregated large-RUs without requiring complex real-time analysis during data reception.
Data Source
AI summary
Proposed are a method and apparatus for receiving a PPDU in a wireless LAN system. Specifically, a reception STA receives a PPDU from a transmission STA via a broadband and decodes the PPDU. The PPDU includes a control field and a data field. When the broadband is a band of 320/160+160 MHz including a primary channel of 160 MHz and a secondary channel of 160 MHz, the data field is received via a first multiple RU in which a 996-RU and a 484-RU are aggregated. The first multiple RU is allocated within the primary channel of 160 MHz or the secondary channel of 160 MHz.