Trigger Frame BSS/VBSS Subfield for Multi-AP Coordination
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Solution Overview
Problem
Current communication systems face challenges in efficiently implementing multi-AP uplink coordination, achieving extremely high throughput, and ensuring high reliability in multi-AP systems.
Innovation Solution
A wireless communication method involving a station (STA) and an access point (AP) that utilizes a trigger frame with a BSS/VBSS subfield to indicate whether Extremely High Throughput (EHT) physical layer protocol data units are transmitted in a Basic Service Set (BSS) or Virtual BSS (VBSS), enabling efficient multi-AP uplink coordination, high throughput, and reliable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-AP coordinated uplink transmission is implemented without clear BSS/VBSS indication, then system complexity is reduced, but transmission reliability and coordination efficiency deteriorate
Solution Approach 1:
The trigger frame is segmented to include a specific BSS/VBSS subfield that clearly indicates the transmission environment. This segmentation allows receiving devices to quickly identify whether the transmission occurs in a BSS or VBSS without parsing the entire frame structure, thereby improving reliability while maintaining manageable complexity through targeted information placement.
Solution Approach 2:
The BSS/VBSS subfield acts as an intermediary indicator between the trigger frame and the actual transmission. This intermediary provides clear, unambiguous information about the transmission environment, enabling receiving devices to make informed decisions about resource allocation and interference management without requiring complex analysis of the entire frame.
2Productivity
If trigger frame includes detailed BSS/VBSS subfield information, then transmission coordination improves, but frame structure complexity increases
Solution Approach 1:
The critical BSS/VBSS indication information is extracted and placed in a dedicated subfield within the trigger frame. This extraction allows receiving devices to obtain the essential coordination information without needing to parse the entire complex frame structure, thereby improving coordination efficiency while keeping the processing complexity manageable through selective information extraction.
Solution Approach 2:
The BSS/VBSS subfield provides preliminary indication of the transmission environment before the actual data transmission occurs. This preliminary information allows receiving devices to prepare appropriate reception parameters and resource allocation strategies in advance, improving coordination efficiency without requiring complex real-time analysis during the transmission itself.
3Productivity
If multi-AP system uses traditional coordination methods, then implementation simplicity is maintained, but throughput achievement deteriorates
Solution Approach 1:
The trigger frame structure is made dynamic by including the BSS/VBSS subfield that can indicate different transmission environments. This dynamic capability allows the system to adapt to varying multi-AP coordination scenarios (such as coordinated beamforming, joint transmission, or distributed coordination) without requiring fundamentally different frame structures, thereby enabling high throughput while managing implementation complexity through a flexible, unified approach.
Data Source
AI summary
An access point (AP), a station (STA), and a wireless communication method are provided. The wireless communication method by the AP includes transmitting, to one or more stations (STAs) by the AP involved in a multi-AP coordinated uplink (UL) transmission, a trigger frame, wherein the trigger frame comprises a basic service set (BSS)/virtual BSS (VBSS) subfield, and the BSS/VBSS subfield indicates whether solicited extremely high throughput (EHT) trigger based (TB) physical layer protocol data units (PPDUs) are transmitted in a BSS or a VBSS.