TB A-PPDU Bandwidth Field Segmentation for HE and EHT WLAN
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Solution Overview
Problem
The increased number of spatial streams in next-generation WLAN systems, such as IEEE 802.11be or EHT, requires improved signaling techniques to efficiently manage bandwidth allocation in TB A-PPDUs, preventing resource waste, channel collisions, and complexity.
Innovation Solution
A method for configuring a bandwidth field by excluding specific bits in the TB A-PPDU, allowing simultaneous transmission of HE and EHT TB PPDUs over 160 MHz channels, with separate bandwidth fields for each, ensuring efficient support for both HE and EHT STAs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a single bandwidth field is used to indicate bandwidth for both HE TB PPDU and EHT TB PPDU, then signaling overhead is reduced, but bandwidth allocation precision deteriorates causing resource waste and channel collisions
Solution Approach 1:
The bandwidth indication is segmented into two separate fields: a first bandwidth field for indicating the bandwidth of HE TB PPDU and a second bandwidth field for indicating the bandwidth of EHT TB PPDU. This segmentation allows each PPDU type to have its own dedicated bandwidth indication, preventing resource waste and channel collisions while maintaining efficient signaling through the use of compact field structures.
2Manufacturing precision
If separate bandwidth fields are configured for HE TB PPDU and EHT TB PPDU, then bandwidth allocation precision is improved, but device complexity increases
Solution Approach 1:
The patent employs parameter changes by using different bit-width configurations for the first and second bandwidth fields according to specific implementation scenarios. This allows the system to adjust the level of detail in bandwidth indication dynamically, achieving precise bandwidth allocation while controlling signaling complexity through flexible parameter configuration.
3Adaptability or versatility
If bandwidth indication does not exclude specific cases, then coverage is improved, but resource waste occurs due to inefficient bandwidth utilization
Solution Approach 1:
The patent extracts and excludes specific bandwidth cases from the general bandwidth indication range. By identifying and removing inefficient or unnecessary bandwidth configurations from the indication set, the system achieves more precise bandwidth allocation that matches actual transmission needs, preventing resource waste while maintaining adequate coverage through the remaining valid bandwidth options.
Data Source
AI summary
The present disclosure proposes a method and a device for configuring a bandwidth field by excluding a bit indicating a specific bandwidth for a TB A-PPDU in a wireless LAN system. Specifically, a reception STA receives a trigger frame from a transmission STA. The reception STA transmits a TB PPDU to the transmission STA via a 320 MHz band. A TB A-PPDU includes an HE TB PPDU for a primary 160 MHz channel and an EHT TB PPDU for a secondary 160 MHz channel. Information on a bandwidth of the TB PPDU does not include a first case where a bandwidth in which the HE TB PPDU is transmitted is 20 MHz and a bandwidth in which the EHT TB PPDU is transmitted is 20 MHz.