BSRP Trigger Frame with Extra Indications for Multi-TID Buffer Status Collection
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Solution Overview
Problem
Current Wi-Fi systems face limitations in collecting buffer status reports (BSRs) from non-access-point stations (STAs) as they can only collect one traffic identifier (TID) at a time, especially when the access point (AP) does not support multi-TID aggregated media access control (MAC) protocol data units, leading to inefficient resource allocation and incomplete reporting of latency-sensitive TIDs.
Innovation Solution
A method is introduced to generate a buffer status report poll (BSRP) trigger frame with extra indications, allowing the AP to collect BSRs of multiple TIDs simultaneously by specifying which TIDs are of interest and supporting multi-TID aggregated MAC protocol data units, enabling efficient reporting through different response formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the AP sends separate BSRP trigger frames for each TID, then each TID can be reported accurately, but the number of transmissions increases and resource allocation efficiency decreases
Solution Approach 1:
The patent combines multiple TID buffer status reports into a single aggregated A-MPDU structure, allowing the AP to collect buffer status information for multiple TIDs in one transmission cycle. This merging approach resolves the contradiction by enabling comprehensive reporting (improving measurement precision) while reducing the number of separate trigger frames needed (improving productivity).
Solution Approach 2:
The patent creates a universal BSRP trigger frame structure that can handle multiple TIDs simultaneously through bitmaps and aggregated reporting. This multi-functional design allows a single trigger frame to serve multiple reporting purposes, eliminating the need for separate transmissions for each TID and thus improving both reporting accuracy and resource efficiency.
2Loss of information
If the AP collects BSR for all TIDs from each STA, then complete buffer status information is obtained, but the reporting overhead and transmission time increase
Solution Approach 1:
The patent extracts only the essential buffer status information for each TID into a compact bitmap format within the aggregated A-MPDU structure. By taking out only the necessary status indicators rather than transmitting complete detailed reports for all TIDs, the system achieves information completeness while minimizing reporting time and overhead.
Solution Approach 2:
The patent changes the reporting parameter format from detailed individual TID reports to compact bitmap representations. This parameter transformation allows multiple TID statuses to be encoded in a space-efficient manner, enabling complete information collection without proportionally increasing transmission time or overhead.
3Adaptability or versatility
If the AP uses traditional BSRP trigger frames, then the system maintains compatibility with existing Wi-Fi standards, but the capability to collect multi-TID BSRs simultaneously is limited
Solution Approach 1:
The patent nests the BSRP trigger frame functionality within the existing OFDMA trigger frame structure, embedding multi-TID reporting capabilities inside the standard frame format. This nesting approach enables advanced multi-TID collection functionality while maintaining compatibility with existing Wi-Fi infrastructure, as the enhanced features are contained within the familiar frame structure.
Solution Approach 2:
The patent segments the buffer status reporting mechanism into modular components: a bitmap field for TID selection, aggregated A-MPDU containers for individual STA reports, and standardized MAC header structures. This segmentation allows the system to add multi-TID functionality without overhauling the entire protocol, thereby increasing versatility while managing device complexity through modular design.
Data Source
AI summary
A wireless communication method includes: generating a buffer status report poll (BSRP) trigger frame, wherein the BSRP trigger frame is configured to carry indication information of buffer status report (BSR) collection; sending the BSRP trigger frame to at least one non-access-point (non-AP) station (STA); and in response to receiving the BSRP trigger frame, generating at least one trigger-based (TB) physical layer (PHY) protocol data unit (PPDU), and sending the at least one TB PPDU to an access point (AP).