Multi-Link WLAN Buffer Status Reporting With QoS Threshold Signaling
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Solution Overview
Problem
The increased number of spatial streams in new WLAN standards like IEEE 802.11be/EHT requires improved signaling techniques for effective buffer status reporting, particularly in multi-link operations, to ensure efficient data transmission and reduce complexity.
Innovation Solution
A method and apparatus for setting the format of buffer status information in multi-link operations, using the AP PS Buffer State subfield in the QoS Control field to inform receiving MLDs about their buffer status, allowing threshold-based reporting without explicit queue size details, thus reducing overhead and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If buffer status information is transmitted using traditional methods in multi-link operation, then complete queue size details are provided, but the overhead of beacon frames increases and implementation complexity increases
Solution Approach 1:
The patent extracts only the essential buffer status information (threshold exceedance status) from the complete queue size details, transmitting merely the necessary information to determine buffer status without providing full queue size data. This reduces the information transmitted to only what is needed for effective buffer management in multi-link operations.
Solution Approach 2:
The patent changes the parameter representation from absolute queue size values to threshold-based status indicators. Instead of transmitting complete queue size information, the system transmits whether the buffer status exceeds a predetermined threshold, transforming the data format to reduce overhead while maintaining operational effectiveness.
2Loss of information
If buffer status information is transmitted using traditional methods in multi-link operation, then complete queue size details are provided, but the overhead of beacon frames increases
Solution Approach 1:
The patent extracts only the essential buffer status information (threshold exceedance status) from the complete queue size details, transmitting merely the necessary information to determine buffer status without providing full queue size data. This reduces the information transmitted to only what is needed for effective buffer management in multi-link operations.
Solution Approach 2:
The patent changes the parameter representation from absolute queue size values to threshold-based status indicators. Instead of transmitting complete queue size information, the system transmits whether the buffer status exceeds a predetermined threshold, transforming the data format to reduce overhead while maintaining operational effectiveness.
3Productivity
If increased number of spatial streams is used in new WLAN standards, then data transmission throughput is improved, but signaling technique complexity increases
Solution Approach 1:
The patent makes the QoS Control field's buffer state subfield serve a dual purpose: it continues to provide traditional buffer status information while simultaneously enabling threshold-based reporting in multi-link operations. This universal approach allows the same field to function in both single-link and multi-link modes without requiring separate signaling mechanisms.
Solution Approach 2:
The patent changes the parameter representation from absolute queue size values to threshold-based status indicators. Instead of transmitting complete queue size information, the system transmits whether the buffer status exceeds a predetermined threshold, transforming the data format to reduce overhead while maintaining operational effectiveness.
Data Source
AI summary
A method and an apparatus for receiving BSR information in a wireless LAN system are presented. Particularly, a reception MLD receives a DL frame from a transmission MLD. The reception MLD transmits a UL frame to the transmission MLD. The DL frame includes BSR information about the reception MLD. The BSR information about the reception MLD is included in a buffer state sub-field of a QoS control field. The BSR information about the reception MLD is traffic information about the reception MLD, which is buffered in the transmission MLD.