Access Point Trigger Frame for Multi-BSS Uplink Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In WLANs, the efficiency of multi-user parallel transmission decreases due to the need for independent trigger frames for each station, leading to bandwidth waste and interference among APs, especially when multiple BSSs share the same channel.
Innovation Solution
An access point sends a radio frame with a common address to trigger multiple stations across different BSSs for uplink multi-user transmission, improving air interface utilization and reducing bandwidth waste by using a common address for all stations under its control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If independent trigger frames are sent for each station, then each station can be individually scheduled, but bandwidth is wasted and interference increases among APs
Solution Approach 1:
The patent merges multiple independent trigger frames into a single trigger frame that addresses multiple stations simultaneously. The trigger frame includes a recipient address field that can be set to a common address, allowing one AP to schedule multiple stations across different BSSs in a single transmission, thereby eliminating bandwidth waste and reducing interference.
Solution Approach 2:
The trigger frame is designed with universal functionality to address multiple BSSs and stations simultaneously. The recipient address field can be configured to work across different BSS identifiers, enabling a single trigger frame to serve multiple purposes and multiple stations, thus improving scheduling efficiency without requiring separate trigger frames for each station.
2Productivity
If multiple BSSs share the same channel, then interference among APs increases, but network capacity and utilization improve
Solution Approach 1:
The patent segments the trigger frame addressing mechanism to distinguish between different BSSs while allowing them to share the same physical channel. By using a common address field that can be configured per BSS, the system allows multiple BSSs to be multiplexed on the same channel without mutual interference, as each BSS's stations can be independently addressed and scheduled within the same trigger frame.
3Productivity
If a common address is used for all stations, then air interface utilization improves, but station identification accuracy must be maintained
Solution Approach 1:
The patent applies local quality by allowing the common address field to have different meanings or configurations for different BSSs. While the address format is unified across the network, each BSS can have its own interpretation or association with the common address, enabling accurate station identification within each BSS context while maintaining the simplicity and efficiency of a unified addressing mechanism across the entire network.
Data Source
Figure 1~3
Figure 4~6
Figure 7~9
AI summary
Disclosed are a data transmission method, an access point and a station. The method comprises: sending a radio frame to a plurality of stations, triggering the stations to perform unlink multi-user transmission, and when the stations belong to different basic service sets of the access point, setting a sending address of the radio frame to be a public address.