Trigger Frame Uplink Resource Allocation Latency Reduction
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Solution Overview
Problem
Current wireless communication systems require multiple trigger frames for allocating uplink resources, leading to increased control overhead and latency, especially when a station (STA) needs to continue using the same or another allocated resource for subsequent uplink transmissions.
Innovation Solution
A modified trigger frame is introduced that includes an indication of the presence or absence of subsequent uplink resource allocations for a STA, allowing a single trigger frame to allocate current and subsequent resources, thereby reducing the need for multiple trigger frames and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple trigger frames are used for uplink resource allocation, then resource allocation completeness is improved, but control overhead and latency increase
Solution Approach 1:
The patent combines multiple resource allocation indications into a single trigger frame by merging the current resource allocation with a subsequent resource allocation indication (single bit field) for the same STA. This allows the AP to allocate both current and future uplink resources in one frame, reducing the number of trigger frames needed while maintaining complete resource allocation information.
Solution Approach 2:
The trigger frame is enhanced to serve multiple functions simultaneously: it allocates current uplink resources, indicates subsequent resource allocations, and provides allocation order information. This multi-functionality allows a single frame to replace what would traditionally require multiple separate frames, reducing latency and control overhead.
2Manufacturing precision
If multiple trigger frames are sent for subsequent resource allocations, then resource allocation accuracy is improved, but control overhead increases
Solution Approach 1:
The patent merges multiple allocation indications into one trigger frame by including a single bit field that indicates subsequent resource allocation for each STA. This consolidation maintains accurate resource allocation information while significantly reducing the number of separate trigger frames required, thereby reducing control overhead.
Solution Approach 2:
The AP performs preliminary action by indicating subsequent resource allocations in advance within the current trigger frame. The single bit field provides forward-looking information about future allocations, allowing STAs to prepare accordingly without waiting for separate subsequent frames, thus maintaining allocation accuracy while reducing overhead.
3Loss of time
If a single trigger frame indicates both current and subsequent allocations, then latency is reduced, but frame complexity increases
Solution Approach 1:
The patent merges current resource allocation and subsequent resource allocation indication into a single trigger frame structure. By integrating these functions and using a compact single bit field for the subsequent allocation indication, the frame structure remains relatively simple while achieving reduced latency through consolidated information delivery.
Solution Approach 2:
The patent modifies the trigger frame parameters by adding a single bit field that indicates subsequent resource allocation. This minimal parameter change allows the frame to convey additional information (current and future allocations) without substantially increasing frame complexity, as the addition is a simple binary indicator rather than a complex data structure.
4Reliability
If multiple trigger frames are used for resource allocation, then resource allocation completeness is improved, but system efficiency decreases
Solution Approach 1:
The patent merges multiple resource allocation operations into a single trigger frame by combining current and subsequent allocation indications. This consolidation maintains complete resource allocation information while reducing the number of frame transmissions required, thereby improving system efficiency by reducing processing overhead and enabling faster resource allocation.
Solution Approach 2:
The enhanced trigger frame serves multiple functions simultaneously - allocating current resources, indicating subsequent allocations, and providing allocation order information. This multi-functionality improves system efficiency by eliminating the need for multiple separate allocation frames while maintaining complete and accurate resource allocation.
Data Source
AI summary
An access point (AP) may communicate with one or more stations (STAs). The AP may send a trigger frame to one or more STAs for allocating uplink resources for a corresponding STA. The trigger frame may indicate a presence or absence of a subsequent uplink resource allocation. Uplink resource allocations for multiple uplink transmissions of one or more STAs may be determined based on the indication(s) in the trigger frame.