Multi-Link WLAN Link Deactivation With PPDU Timing Control
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Solution Overview
Problem
Existing wireless local area network (WLAN) systems lack efficient methods for managing link activation and deactivation during multi-link operations, particularly in advanced communication standards like IEEE 802.11be (EHT), which utilize enhanced features such as increased bandwidth and hybrid automatic repeat request (HARQ) schemes.
Innovation Solution
A method for a receiving device in a WLAN system to deactivate a specific link by receiving a physical protocol data unit (PPDU) with a first control field containing information on link disablement and a time point for disabling the link, allowing STAs to determine frame transmission start and stop times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-link operation is implemented in WLAN systems, then communication efficiency and bandwidth are improved, but link management complexity increases
Solution Approach 1:
The patent introduces a control field as an intermediary mechanism within the PPDU that carries link disablement information and timing details. This control field acts as a mediator between the transmission device and receiving devices, enabling coordinated link deactivation without requiring complex direct management protocols between multiple links.
Solution Approach 2:
The patent implements preliminary action by including advance notification of link disablement in the control field before the actual link deactivation occurs. The control field provides timing information that allows receiving devices to prepare for the link change in advance, smoothing out the transition and reducing management complexity during multi-link operations.
2Ease of manufacture
If link deactivation is implemented without precise timing control, then implementation simplicity is maintained, but communication reliability deteriorates
Solution Approach 1:
The control field includes timing information that is set in advance before link deactivation occurs. This preliminary timing notification allows receiving devices to know exactly when the link will be disabled, enabling them to prepare their transmission schedules accordingly. This maintains implementation simplicity through straightforward timing propagation while ensuring communication reliability through precise coordination.
Solution Approach 2:
The control field mechanism provides feedback about the intended link deactivation timing to all receiving devices. This feedback loop ensures that all devices have synchronized understanding of when the link change occurs, maintaining reliability without requiring complex confirmation protocols or real-time coordination.
Data Source
AI summary
In a Wireless Local Area Network system, a reception device can receive information about link deactivation, and deactivate a link. The proposed method includes receiving a physical protocol data unit (PPDU) including a first control field in a first link. In the method, the first control field may include information related to disablement of the first link and information on a time point at which the first link is disabled. The proposed method further includes disabling the first link based on the first control field.