Multi-STA Trigger Frame Structure for A-PPDU Signaling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless local area network (WLAN) systems face inefficiencies in triggering transmission of aggregated PPDU (A-PPDU) across multiple STAs, particularly when they support different standards, requiring a more efficient signaling method.
Innovation Solution
A novel trigger frame structure and method are proposed to simultaneously trigger multiple STAs, enhancing signaling efficiency, especially when STAs support different standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional trigger frame structure is used to trigger multiple STAs, then the triggering function is achieved, but signaling efficiency is insufficient especially when STAs support different standards
Solution Approach 1:
The trigger frame is segmented into distinct fields: a common information field containing trigger information applicable to all STAs, and multiple user information fields each containing STA-specific parameters. This segmentation allows efficient simultaneous triggering of multiple STAs while maintaining compatibility across different standards through the standardized common information field.
Solution Approach 2:
The common information field serves as a universal component that all STAs can interpret regardless of their specific standard support, enabling the trigger frame to function across multiple WLAN standards (HE, EHT, etc.). The field includes parameters like trigger type, bandwidth, and resource unit allocation that are universally applicable.
2Loss of information
If separate trigger frames are sent to each STA, then individual STA triggering is achieved, but signaling overhead increases
Solution Approach 1:
Multiple trigger indications for different STAs are merged into a single trigger frame. The common information field contains shared parameters while user information fields contain STA-specific parameters, combining what would otherwise require multiple separate frames into one efficient signaling operation.
Solution Approach 2:
The trigger frame structure adds a dimensional organization by separating information into common (shared across all STAs) and user-specific (individual STA) fields. This dimensional separation allows efficient packing of multiple trigger indications without increasing overall frame overhead.
3Adaptability or versatility
If the trigger frame structure is optimized for single standard STAs, then simplicity is maintained, but adaptability to multiple standards decreases
Solution Approach 1:
The common information field is designed with universal parameters that can be interpreted by STAs supporting different WLAN standards (HE, EHT, etc.). This universality enables the same trigger frame structure to adapt to multiple standards without requiring standard-specific frame variations.
Solution Approach 2:
The trigger frame structure allows parameter flexibility where certain fields can be adjusted or interpreted differently based on the STA's supported standard. The common information field contains parameters that can be adapted across standards while maintaining a consistent overall frame structure.
Data Source
AI summary
The present specification proposes an improved trigger frame structure for triggering a plurality of STAs and a method for allocating bandwidths and RUs to the plurality of STAs on the basis of the improved trigger frame structure. Here, according to an embodiment of the present specification, the plurality of STAs may be STAs supporting different standards. Also, according to another embodiment of the present specification, TB PPDUs transmitted by the plurality of STAs on the basis of the improved trigger frame structure may be A-PPDUs.