Wireless Trigger Frames Using TIDs for Precise QoS Reporting
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Solution Overview
Problem
Existing systems in artificial reality environments struggle to effectively prioritize and manage different types of wireless traffic streams, leading to issues like motion sickness due to latency inconsistencies, particularly in augmented reality contexts.
Innovation Solution
A mechanism is introduced to trigger reporting and QoS data transmission based on specific Traffic Identifiers (TIDs) rather than Access Categories (ACs), allowing for higher resolution traffic differentiation and improved compliance with restricted Target Wake Time (TWT) agreements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Access Categories (ACs) are used for traffic prioritization, then traffic management is simplified, but traffic differentiation resolution is insufficient leading to latency inconsistencies
Solution Approach 1:
The patent segments the traffic management system into two hierarchical levels: Access Categories (ACs) for high-level traffic grouping and Traffic Identifiers (TIDs) for fine-grained traffic differentiation. This segmentation allows the system to maintain simplified AC-based management while introducing precise TID-based differentiation only where needed, resolving the contradiction between simplicity and precision.
Solution Approach 2:
The patent introduces a new dimension of traffic identification by adding TIDs as a second layer of differentiation beyond ACs. This dimensional expansion enables the system to differentiate traffic streams with higher resolution (up to 16 distinct TIDs per AC) without completely replacing the existing AC framework, thus maintaining manageability while achieving precise traffic differentiation.
2Loss of time
If traditional trigger frames without TID specification are used, then frame structure is simpler, but QoS data transmission timing is imprecise causing latency issues
Solution Approach 1:
The patent applies preliminary action by specifying the TID in the trigger frame before the actual QoS data transmission occurs. This allows the receiving device to prepare the appropriate traffic stream in advance, ensuring that QoS data is transmitted at the precise moment when the corresponding traffic stream is ready, thereby reducing latency inconsistencies without requiring complex real-time coordination.
Solution Approach 2:
The patent implements feedback mechanisms where the trigger frame with TID specification elicits a response from the receiving device that confirms proper traffic stream identification and preparation. This feedback loop ensures that the TID-based triggering mechanism operates correctly and maintains latency consistency across different traffic streams.
3Measurement precision
If TID-based triggering is implemented, then QoS management precision is improved, but compliance with restricted TWT agreements becomes more challenging
Solution Approach 1:
The patent applies local quality by implementing TID-based triggering selectively for specific traffic streams that require precise QoS management, rather than applying it uniformly to all traffic. This allows the system to maintain high QoS precision for critical streams while preserving TWT compliance for time-sensitive traffic, resolving the contradiction between precision and reliability.
Data Source
AI summary
A device may include one or more processors configured to determine a first traffic identifier of a first wireless traffic stream, from a plurality of traffic identifiers. The one or more processors may generate a first frame including the first traffic identifier, the first frame to trigger a receiver device to send a response frame that comprises quality of service (QoS) data corresponding to the first wireless traffic stream. The one or more processors may set a frame type field of the first frame to a type indicating a trigger frame including one or more traffic identifiers. The one or more processors may set a first bit of a traffic identifier bitmap field of the first frame to indicate the first traffic identifier. The one or more processors may wirelessly transmit, via a transmitter, the generated first frame to the receiver device.