Access Point Uplink Group Scheduling for Low-Latency WLAN Traffic
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Solution Overview
Problem
Existing methods for uplink signal transmission in wireless LANs, such as those proposed in IEEE 802.11be (EHT), face challenges in reducing latency and collisions without increasing resource allocation, particularly in scenarios where terminals require low latency and buffer status reports are not recognized by the access point.
Innovation Solution
A method involving the use of a Trigger frame that includes a Common Info field for common terminal information and a User Info field for specific terminal information, along with a Group AID to schedule uplink signal transmission for groups of terminals, allowing for reduced collisions and efficient resource allocation by varying transmission timings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If terminals transmit uplink signals using random access without buffer status reports, then latency is reduced, but collision probability increases
Solution Approach 1:
The patent segments terminals into different groups based on their latency requirements and traffic types. By dividing the terminal population into multiple groups with different transmission timings and resource allocations, the system reduces collision probability while maintaining low latency for urgent traffic. Each group can transmit independently according to its specific requirements.
Solution Approach 2:
The patent implements dynamic transmission timing where terminals adjust their uplink transmission times based on traffic type and group assignments. Instead of fixed random access, terminals dynamically select transmission opportunities based on current network conditions and their specific latency requirements, reducing collisions while maintaining low latency.
2Reliability
If transmission resources are increased to reduce collisions, then reliability improves, but resource allocation efficiency decreases
Solution Approach 1:
The patent merges multiple transmission opportunities into structured uplink multi-access occasions with specific patterns. By combining random access opportunities with scheduled access in a unified framework, the system achieves collision reduction without proportionally increasing total resource allocation. The merging of different access types allows efficient resource utilization.
Solution Approach 2:
The patent changes key parameters such as transmission timing offsets, group identifiers, and traffic type associations to optimize resource allocation. By adjusting these parameters dynamically based on network conditions and terminal requirements, the system reduces collisions while maintaining high resource allocation efficiency without simply increasing resource quantity.
3Productivity
If group-based scheduling is implemented, then transmission efficiency improves, but system complexity increases
Solution Approach 1:
The patent creates a universal group-based scheduling framework that handles multiple traffic types, terminal groups, and transmission scenarios through a single unified mechanism. This multi-functional approach improves transmission efficiency across diverse scenarios without requiring separate complex systems for each case, thereby limiting the increase in overall system complexity.
Solution Approach 2:
The patent performs preliminary grouping and configuration of terminals before uplink transmission occurs. By pre-establishing terminal groups, assigning group identifiers, and configuring transmission parameters in advance, the system simplifies the actual transmission process and reduces real-time complexity while maintaining high transmission efficiency.
Data Source
AI summary
This access point comprises: a control circuit that generates, by using identification information shared by a plurality of terminals included in a terminal group, a control signal for indicating allocation of an uplink-signal transmission resource of one traffic type from among a plurality of traffic types; and a transmission circuit that transmits the control signal.