A-PPDU Sounding Protocol for Multi-Standard WLAN Compatibility
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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 than what is currently supported by IEEE 802.11ax.
Innovation Solution
The proposed solution involves a method and apparatus for supporting A-PPDU transmission in a sounding protocol sequence within a WLAN. This includes transmitting NDP Announcement frames for different variants in A-PPDU transmission across different frequency bands and transmitting Sounding NDPs for various STA variants, ensuring compatibility between different protocol standards, such as IEEE 802.11ax and IEEE 802.11be.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single protocol standard is used for all transmissions, then device compatibility is maintained, but data throughput and system performance are limited
Solution Approach 1:
The patent segments the transmission system into multiple protocol variants (first variant based on first protocol standard, second variant based on second protocol standard beyond version of first protocol standard). Each variant can be independently selected and transmitted according to the capabilities of the communicating devices, allowing high-throughput protocols to be used when both devices support them while maintaining compatibility with legacy devices.
Solution Approach 2:
The patent implements dynamic protocol selection where the protocol variant used is determined based on real-time conditions including device capabilities, environmental factors, and transmission requirements. The system can dynamically switch between different protocol standards (IEEE 802.11ax, IEEE 802.11be, etc.) to optimize performance while ensuring compatibility.
2Reliability
If A-PPDU transmission is implemented across multiple frequency bands with different protocol variants, then communication stability in dense environments is enhanced, but system complexity increases
Solution Approach 1:
The patent extends the transmission system into the frequency band dimension by supporting A-PPDU transmission across multiple frequency bands simultaneously. Each frequency band can carry transmissions using appropriate protocol variants, allowing the system to exploit frequency diversity to improve reliability in dense environments while managing complexity through structured frequency band management.
Solution Approach 2:
The patent creates a universal transmission framework that can handle multiple protocol variants (IEEE 802.11ax, IEEE 802.11be, and future versions) within a single system. The apparatus is designed to universally support different protocol standards, making it adaptable to various device capabilities and environmental conditions without requiring separate specialized systems for each protocol.
Data Source
AI summary
A method performed by an apparatus in a wireless local area network (WLAN) is provided. The method includes: transmitting a first NDP Announcement frame for a first variant and a second NDP Announcement frame for a second variant in A-PPDU transmission, wherein the first NDP Announcement frame for the first variant and the second NDP Announcement frame for the second variant have a same time duration and are transmitted in different frequency bands; and transmitting at least one Sounding NDP for the first variant for both at least one first STA for the first variant and at least one second STA for the second variant, 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.