TX-Unavailability Signaling for Non-AP STA Coexistence
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Solution Overview
Problem
Wireless Local Area Networks (WLANs) face challenges in managing transmission unavailability modes, particularly for non-Access Point (AP) stations, which are required to acknowledge transmissions from the AP, leading to inefficiencies and potential interference during coexistence events.
Innovation Solution
An unavailability mode mechanism is implemented to support non-AP stations, allowing them to inform the associated AP about coexistence events, enabling adaptive transmission and reception strategies, including full-unavailability periods for non-Wi-Fi activities while preserving the ability to receive AP transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-AP stations are required to acknowledge transmissions from the AP, then transmission reliability is improved, but device complexity and interference during coexistence events worsen
Solution Approach 1:
The patent implements a dynamic transmission unavailability mode that allows non-AP stations to switch between acknowledgment and non-acknowledgment states based on their operational needs. The station can dynamically indicate to the AP when it will be unavailable for acknowledgments, enabling flexible adaptation to coexistence events while maintaining reliability when needed.
Solution Approach 2:
The patent changes the operational parameter of acknowledgment behavior by introducing a transmission unavailability indication mechanism. The non-AP station can modify its acknowledgment status parameter to inform the AP of upcoming unavailability periods, allowing the system to adapt transmission protocols based on the station's current state.
2Productivity
If non-AP stations perform full-unavailability periods for non-Wi-Fi activities, then productivity is improved, but loss of information worsens
Solution Approach 1:
The patent applies preliminary action by having the non-AP station notify the AP in advance of transmission unavailability periods. The station sends a transmission unavailability indication before becoming unavailable, allowing the AP to prepare appropriate actions (such as buffering data or selecting alternative recipients) to prevent information loss during the station's busy period.
3Ease of operation
If non-AP stations are allowed to be unavailable for transmit, then ease of operation is improved, but reliability worsens
Solution Approach 1:
The patent implements feedback by establishing a communication channel where the non-AP station informs the AP about its transmission unavailability status. The AP receives this feedback and adjusts its transmission strategy accordingly, ensuring that data is not lost during unavailability periods while allowing the station to operate freely when unavailable.
Data Source
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AI summary
For example, an apparatus may include logic and circuitry configured to cause a non Access Point (AP) (non-AP) station (STA) to identify one or more Transmit (Tx) unavailability (Tx-unavailability) time periods during which the non-AP STA is to be at a Tx-unavailability mode at which the non-AP STA is to be unavailable to transmit to an AP and to be available to receive transmissions from the AP. For example, the non-AP STA may be configured to transmit a frame including Tx-unavailability information to the AP. For example, the Tx-unavailability information may be configured to indicate the one or more Tx-unavailability time periods.