ACK Sharing in Multi-Link WLAN Devices
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Solution Overview
Problem
In wireless local area networks (WLANs), existing technologies face challenges in efficiently managing acknowledgement (ACK) transmissions across multiple links, leading to suboptimal use of time resources and potential communication quality issues due to the need to transmit ACKs on links with varying channel states.
Innovation Solution
A method where a receiving multi-link device (MLD) in a WLAN system, comprising first and second stations (STAs), transmits an acknowledgement (ACK) sharing capability element, allowing ACKs for multiple data transmissions to be sent through a specific link, thereby optimizing time resource usage and improving communication quality by ensuring ACKs are received on a link with a good channel state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ACK is transmitted on each link separately, then reliability of acknowledgment is improved, but time resource usage increases and channel state dependency causes communication quality issues
Solution Approach 1:
The patent combines multiple ACK transmissions into a single shared ACK frame by introducing an ACK sharing mechanism. The receiving MLD aggregates ACK information from multiple links and transmits them together through a selected link, eliminating the need for separate ACK transmissions on each link and thereby reducing time resource consumption while maintaining acknowledgment reliability.
Solution Approach 2:
The patent implements a universal ACK transmission mechanism where a single ACK frame can serve multiple links simultaneously. The ACK sharing capability element enables the system to perform multiple acknowledgment functions through one transmission event, improving efficiency by allowing one transmission to fulfill multiple purposes across different links.
2Reliability
If ACK is transmitted on each link separately, then acknowledgment completeness is improved, but device complexity increases
Solution Approach 1:
The patent merges the complexity of managing multiple separate ACK transmissions into a single unified ACK frame structure. By aggregating ACK information from multiple links into one frame and using a selected link for transmission, the system reduces the complexity of ACK transmission management while maintaining complete acknowledgment coverage across all links.
3Productivity
If ACK is transmitted on a link with poor channel state, then transmission opportunity is maximized, but communication quality deteriorates
Solution Approach 1:
The patent applies local quality optimization by selecting a specific link with good channel state for ACK transmission rather than uniformly distributing ACK transmissions across all links. The system evaluates channel conditions and chooses the optimal link locally for ACK sharing, improving communication quality while still providing transmission opportunities across the multi-link system.
Data Source
AI summary
The present disclosure is related to a multi-link device (MLD) in a wireless local area network (LAN). The MLD in the present disclosure includes a first station (STA) operating on a first link and a second STA operating on a second link. The MLD may transmit acknowledgement (ACK) sharing information which is related to whether ACKs can be shared between the first STA and the second STA.