Aggregated Resource Units for Punctured WLAN PPDU Reception
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Solution Overview
Problem
Current wireless local area network (WLAN) systems face challenges in efficiently transmitting and receiving Physical Protocol Data Units (PPDUs) using multiple Resource Units (RUs) in non-OFDMA schemes, particularly in next-generation standards like IEEE 802.11be, which require improved signaling techniques to support increased spatial streams and bandwidth.
Innovation Solution
The proposed method involves configuring multiple RUs to transmit and receive PPDUs in a non-OFDMA scheme, specifically using a combination of single user (SU) and multi-user multi-input multi-output (MU-MIMO) transmissions, with preamble puncturing and aggregation of various RU sizes, allowing for efficient data field reception through aggregated RUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple RUs of various sizes are aggregated for PPDU transmission in non-OFDMA scheme, then transmission efficiency and throughput are improved, but system complexity and signaling overhead increase
Solution Approach 1:
The patent segments the 80 MHz band into multiple RUs of different sizes (26-tone, 52-tone, 106-tone, 242-tone RUs) that can be independently allocated and aggregated. This segmentation allows flexible RU aggregation to match different data transmission requirements while maintaining manageable system complexity through standardized RU definitions.
Solution Approach 2:
The patent implements dynamic RU aggregation where the receiving STA can be configured to receive data fields through different combinations of RUs based on puncturing patterns. The system dynamically adapts RU aggregation configurations according to channel conditions and transmission requirements, improving efficiency without permanently increasing system complexity.
2Adaptability or versatility
If preamble puncturing is applied to support flexible RU allocation, then adaptability and transmission flexibility are improved, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent applies preamble puncturing in advance before the data field transmission. By puncturing the preamble (L-STF, L-LTF, L-SIG, HE-SIG-A, HE-STF, HE-LTF) and indicating the puncturing pattern through signaling, the system prepares the transmission structure beforehand, allowing the receiving STA to efficiently process only the necessary portions and reducing overall signaling overhead.
Solution Approach 2:
The patent applies puncturing selectively to specific portions of the preamble rather than uniformly across the entire signal. Different puncturing patterns can be applied to different 20 MHz subchannels based on local channel conditions and RU allocation requirements, optimizing transmission flexibility while minimizing signaling overhead.
3Productivity
If increased bandwidth and more spatial streams are used, then throughput and transmission capacity are improved, but device complexity and processing requirements increase
Solution Approach 1:
The patent combines multiple RUs of different sizes into aggregated RU structures for PPDU transmission. By merging multiple smaller RUs or combining different RU types (26-tone, 52-tone, 106-tone, 242-tone) into a unified aggregated structure, the system achieves higher throughput and utilizes more spatial streams efficiently while managing processing complexity through standardized aggregation rules.
Data Source
AI summary
Proposed are a method and an apparatus for receiving a PPDU in a wireless LAN system. Specifically, a reception STA receives a PPDU from a transmission STA through a first band and decodes the PPDU. The PPDU includes a control field and a data field. The first band is an 80 MHz band including first and second 20 MHz subchannels and a first 40 MHz subchannel. When the first 20 MHz subchannel is punctured, the second 20 MHz subchannel includes a first multi-RU in which first and second 26-RUs, 52-RUs, and 106-RUs are aggregated. The first 40 MHz subchannel includes a 484-RU. The data field is received through a second multi-RU in which the first multi-RU and the 484-RU are aggregated.