Multi-Link AP MLD Trigger Frame Tunneling for Blindness Periods
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Solution Overview
Problem
In wireless LAN systems supporting multi-link operations, there is a need for effective methods to manage direct communication during blindness periods in TDLS-based setups, particularly to prevent errors and ensure reliable frame transmission.
Innovation Solution
The proposed method involves an access point (AP) transmitting a trigger frame in a multi-link setup, receiving responses from stations, and handling data frames through a tunneling scheme, with specific fields indicating the completion of communication procedures and periods where reception is not possible, ensuring reliable data transmission and error prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct communication is established between STAs in a multi-link system, then communication efficiency is improved, but transmission errors may occur during blindness periods
Solution Approach 1:
The AP MLD acts as an intermediary that receives data frames from one STA on the direct link and forwards them to the destination STA through the trigger frame mechanism on the control link, bridging the communication during blindness periods when direct reception is not possible
Solution Approach 2:
The communication path is segmented into two independent links: a control link for trigger frame exchange and a data link for direct STA-to-STA communication, allowing the control link to operate independently during blindness periods when the data link is unavailable
2Productivity
If multi-link operations are implemented to increase throughput, then data transmission capacity is improved, but system complexity increases
Solution Approach 1:
The trigger frame mechanism serves multiple functions: it initiates communication procedures, allocates resources, and enables data transmission during blindness periods, allowing a single control mechanism to manage multiple links and direct communication scenarios
Solution Approach 2:
The AP MLD performs preliminary actions by transmitting trigger frames that pre-coordinate communication procedures between STAs, establishing the framework for direct communication before actual data transfer begins, which simplifies real-time coordination complexity
Data Source
AI summary
A method and a device for direct communication in a communication system supporting multiple links are disclosed. A method of an AP MLD comprises the steps of: transmitting a trigger frame in multiple links including a first link and a second link; receiving a response frame for the trigger frame from a first STA associated with an STA MLD in the first link; receiving a first data frame from a third STA in the second link; and when a subject to receive the first data frame is a second STA associated with the STA MLD, transmitting a second data frame generated on the basis of the first data frame, to the first STA in the first link.