Multi-Link WLAN Error Recovery Through Dynamic TXOP Responder Switching
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Solution Overview
Problem
In wireless local area networks (WLAN), existing systems face inefficiencies in error recovery when transmission errors occur, leading to wasted transmission opportunities (TXOP) and non-STR issues, particularly in multi-link environments.
Innovation Solution
A method for error recovery in multi-link WLAN systems involves a transmitting MLD acquiring a TXOP, transmitting PPDU, and changing the TXOP responder if a block acknowledgment is not received within a preconfigured time, allowing efficient utilization of remaining TXOPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transmission error occurs in multi-link WLAN, then the current TXOP cannot be completed successfully, but the remaining TXOP time is wasted and cannot be utilized
Solution Approach 1:
The patent applies dynamics by making the TXOP responder dynamic rather than fixed. When a transmission error is detected on one link, the system dynamically changes the responder to another MLD that can successfully complete the transmission, thereby utilizing the remaining TXOP time effectively instead of wasting it.
Solution Approach 2:
The patent changes the parameter of TXOP responder identification based on transmission status. By monitoring whether a BA frame is received within a preconfigured time interval, the system changes the responder parameter to a different MLD when transmission fails, enabling continuation of the TXOP with a different target device.
2Reliability
If a non-STR MLD is being received on one link, then transmission on other links is difficult, but existing error recovery methods cause TXOP waste
Solution Approach 1:
The system dynamically adapts the TXOP responder based on real-time transmission status. When a non-STR MLD experiences transmission failure on a specific link, the system dynamically switches to another MLD as the new responder, allowing the TXOP to continue productively rather than being abandoned.
Solution Approach 2:
The patent implements feedback mechanisms by monitoring whether BA frames are received within preconfigured time intervals. This feedback information triggers the system to change the TXOP responder when transmission errors are detected, enabling continuous utilization of TXOP opportunities.
3Manufacturing precision
If the transmitting MLD waits for BA frame confirmation, then transmission accuracy is ensured, but transmission opportunities are wasted when errors occur
Solution Approach 1:
The system dynamically adjusts the TXOP responder based on transmission feedback. When transmission accuracy is confirmed through BA frame reception, the original responder completes the transaction. When errors are detected, the system dynamically reassigns the responder to another MLD, maintaining both accuracy and productivity.
Solution Approach 2:
The patent changes the TXOP responder parameter based on transmission status feedback. By monitoring BA frame reception within preconfigured time intervals, the system changes the responder parameter when transmission failures occur, allowing continued productive transmission rather than idle waiting.
Data Source
AI summary
The present disclosure proposes a transmitting multi-link device (MLD) including a first station (STA) operating on a first link and a second STA operating on a second link. The transmitting MLD acquires a first transmission opportunity (TXOP) in the first link and transmits a first physical protocol data unit (PPDU) in the first link. The transmitting MLD receives a block acknowledgment (BA) frame for the first PPDU in the first link and transmits a second PPDU in the first link. The transmitting MLD changes a responder of the first TXOP based on not receiving, from the receiving MLD, a BA frame for the second PPDU within a preconfigured time interval in the first link.