Trigger Frame Flow Signaling for QoS-Aware Wireless Scheduling
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Solution Overview
Problem
Current wireless communication standards lack effective signaling mechanisms to identify the correct traffic flow for trigger frames, particularly in uplink and peer-to-peer directions, leading to complications in meeting quality of service requirements and inefficient resource allocation.
Innovation Solution
Introduce new signaling in the User Information field of trigger frames to include flow identifiers, such as QoS flow identifiers, and repurpose existing fields to signal preferred TIDs, enabling clearer identification of traffic flows and improved scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If new signaling fields are added to trigger frames to include flow identifiers, then traffic flow identification accuracy is improved, but trigger frame complexity increases
Solution Approach 1:
The patent embeds flow identifier information within existing trigger frame structures by nesting the flow identifier field inside the User Information field, which already contains resource allocation information. This nested approach allows additional signaling capability without fundamentally changing the trigger frame architecture, thus improving identification accuracy while controlling complexity growth.
Solution Approach 2:
The User Information field in trigger frames is enhanced to serve multiple functions: it continues to provide resource allocation information while simultaneously carrying flow identifier signaling. This multi-functional use of existing fields reduces the need for entirely new frame structures, balancing improved identification capability with frame complexity management.
2Ease of operation
If stations must determine traffic flows independently, then device autonomy is improved, but scheduling efficiency deteriorates
Solution Approach 1:
The access point performs preliminary action by pre-identifying and signaling the correct traffic flow and corresponding TID in the trigger frame before the station needs to make scheduling decisions. This preliminary identification by the AP reduces the computational burden on stations and ensures faster, more efficient scheduling while maintaining station autonomy in executing transmissions.
Solution Approach 2:
The trigger frame acts as an intermediary mechanism that carries flow identification information from the AP to the station. This intermediary signaling resolves the contradiction by providing stations with the necessary information to efficiently determine traffic flows without requiring complex independent analysis, thus improving scheduling efficiency while preserving device autonomy.
3Reliability
If QoS requirements are strictly enforced, then service quality is improved, but resource allocation flexibility deteriorates
Solution Approach 1:
The patent enables dynamic resource allocation by allowing the AP to signal different TIDs for different traffic flows within the same trigger frame. This dynamic approach allows QoS requirements to be enforced for specific flows while maintaining flexibility in allocating resources across multiple flows, as the AP can adaptively assign TIDs based on current network conditions and QoS requirements.
Solution Approach 2:
Different TIDs are assigned to different traffic flows to provide localized QoS treatment. This allows strict QoS enforcement for specific high-priority flows while permitting more flexible allocation for other flows, achieving both service quality reliability and resource allocation flexibility through differentiated treatment of individual flows within the overall resource allocation framework.
Data Source
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AI summary
An apparatus for an access point, AP, the apparatus including processing circuitry coupled to storage, the processing circuitry may be configured to: encode a buffer status report poll, BSRP, trigger frame for transmission to a recipient AP, wherein the BSRP trigger frame comprises a user information field comprising information representing a flow that the AP requests to schedule during a transmission opportunity, TXOP; and instruct to transmit the BSRP trigger frame to the recipient AP.