A-PPDU Preamble Puncturing Signaling for HE and EHT Decoding

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The increased number of spatial streams in the next-generation wireless LAN system (EHT) requires improved signaling techniques to efficiently transmit and decode HE and EHT PPDUs simultaneously, ensuring backward compatibility with the 802.11ax system.

Innovation Solution

A method and apparatus for indicating a preamble puncturing pattern in an A-PPDU, allowing simultaneous transmission of HE and EHT PPDUs, with phase rotation applied to fields like HE-STF or EHT-STF, and detailed preamble puncturing patterns for each channel configuration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If HE PPDU and EHT PPDU are transmitted simultaneously in A-PPDU, then throughput is enhanced, but device complexity increases

Engineering Contradiction:

ImprovethroughputVSAvoidsignaling technique complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent divides the A-PPDU into distinct first PPDU (HE PPDU) and second PPDU (EHT PPDU) segments, each with its own signal fields containing preamble puncturing pattern information. This segmentation allows independent processing and decoding of each PPDU type while maintaining simultaneous transmission, thereby resolving the complexity issue through structured organization.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces signal fields as intermediary structures that carry preamble puncturing pattern information for both HE and EHT PPDUs. These intermediary fields enable the receiving device to identify and process each PPDU type correctly without confusion, facilitating simultaneous transmission while managing complexity through standardized intermediate representations.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If increased number of spatial streams are used, then throughput is improved, but ease of operation deteriorates

Engineering Contradiction:

ImprovethroughputVSAvoidsignal processing complexity

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The patent applies local quality by providing separate and specific preamble puncturing pattern information within the signal fields for each PPDU type. This allows the receiving device to process HE and EHT PPDUs with appropriate local characteristics and parameters, making the increased spatial stream configuration manageable through targeted processing rather than uniform complex processing.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12587314B2Method and device for indicating preamble puncturing pattern in A-PPDU in wireless LAN system

Publication Date: 2026.03.24 LG ELECTRONICS INC

AI summary

Proposed are a method and device for receiving an A-PPDU in a wireless LAN system. Specifically, a reception STA receives an A-PPDU from a transmission STA and decodes the A-PPDU. The A-PPDU includes a first PPDU for a primary 160 MHz channel and a second PPDU for a secondary 160 MHz channel. A first signal field includes information about a bandwidth in which the first PPDU is transmitted. The information about the bandwidth in which the first PPDU is transmitted includes information about a first preamble puncturing pattern punctured in a unit of a 20 MHz channel in the primary 160 MHz channel. A second signal field includes information about a second preamble puncturing pattern.