Aggregated PPDU Duplex Transmission for WLAN Stability and Throughput
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing WLAN systems, such as IEEE 802.11ax, face challenges in maintaining communication stability in dense environments with many users, and there is a need for a new WLAN system to support higher data throughput.
Innovation Solution
The proposed method involves transmitting a first physical layer convergence protocol (PLCP) protocol data unit (PPDU) for a first variant and a second PPDU for a second variant in an aggregated-PPDU (A-PPDU) format, where the second PPDU is transmitted in duplicate (DUP) mode, supporting multiple user cascading sequences and compatibility with different protocol standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IEEE 802.11ax is used to support dense environments, then communication stability is improved, but data throughput is limited
Solution Approach 1:
The patent segments the PPDU structure into multiple variants (first variant with first control field, second variant with second control field) that can be independently configured and transmitted. This segmentation allows the system to maintain compatibility with legacy 802.11ax standards while incorporating new features for higher throughput, effectively resolving the contradiction between stability and productivity.
Solution Approach 2:
The patent introduces dynamic transmission modes including duplicate (DUP) mode for the second PPDU variant, allowing the system to adapt transmission parameters based on channel conditions and user requirements. This dynamic approach enables the system to optimize for either stability or throughput depending on the operational context.
2Productivity
If a new WLAN system is developed to support higher data throughput, then productivity is improved, but compatibility with existing protocol standards deteriorates
Solution Approach 1:
The patent creates a universal A-PPDU structure that can accommodate multiple PPDU variants with different control fields corresponding to different protocol standards. The first control field maintains compatibility with 802.11ax while the second control field enables advanced features for higher throughput, allowing a single system to serve multiple protocol requirements simultaneously.
Solution Approach 2:
The patent embeds multiple PPDU variants within a single A-PPDU container structure. The first PPDU (legacy variant) and second PPDU (advanced variant) are nested within the aggregated structure, allowing legacy devices to process only the first variant while advanced devices can utilize both variants, achieving backward compatibility while enabling new capabilities.
3Reliability
If multiple user transmissions are managed in dense environments, then communication stability is improved, but system complexity increases
Solution Approach 1:
The patent segments user transmissions into multiple cascading sequences where each sequence is handled with dedicated control fields. The first control field manages legacy users while the second control field manages advanced users, allowing the system to handle multiple users independently without requiring complex cross-protocol coordination, thus maintaining stability while managing complexity.
Data Source
AI summary
A method performed by an apparatus in a wireless local area network (WLAN) is provided. The method comprises: transmitting a first physical layer convergence protocol (PLCP) protocol data unit (PPDU) for a first variant including a first control field and a second PPDU for a second variant including a second control field in A(aggregated)-PPDU, wherein the second PPDU for the second variant is transmitted in duplicate (DUP) mode; and receiving a first response to the first PPDU and a second response to the second PPDU in A-PPDU based on the first control field and the second control field, respectively, wherein the first variant is based on a first protocol standard and the second variant is based on a second protocol standard, and wherein the second protocol standard is beyond version of the first protocol standard.