Uplink Frequency-Unit Reservation for Low-Latency WLAN Traffic
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Solution Overview
Problem
In wireless local area networks, event-driven latency-sensitive traffic cannot be transmitted through pre-scheduled resources due to its unpredictability, leading to inefficient and untimely transmission of low-latency data.
Innovation Solution
A first STA reserves frequency-domain units in an uplink transmission, allowing other STAs with pending low-latency traffic to report buffer information, enabling the access point to timely transmit event-driven uplink low-latency traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-scheduled resources are used for transmission, then resource allocation is efficient and orderly, but latency-sensitive traffic cannot be transmitted timely due to unpredictability
Solution Approach 1:
The patent reserves specific frequency-domain units in advance within uplink transmission resources, creating pre-prepared channels that can be immediately utilized by STAs with latency-sensitive traffic. This preliminary reservation allows STAs to quickly access dedicated resources without waiting for general resource allocation procedures, thus reducing latency while maintaining resource management efficiency.
2Speed
If dedicated resources are reserved for low-latency traffic, then transmission speed improves, but resource utilization efficiency decreases
Solution Approach 1:
The reserved frequency-domain units serve multiple purposes: they function as dedicated low-latency channels when needed, but can be dynamically allocated to other STAs when not in use by latency-sensitive traffic. This multi-functionality ensures that resources are efficiently utilized for both latency-sensitive and non-latency-sensitive traffic, preventing resource waste while maintaining high transmission speeds when required.
Solution Approach 2:
The patent implements dynamic allocation where the reserved frequency-domain units can be flexibly assigned to different STAs based on real-time traffic demands. When latency-sensitive traffic is detected, the reserved resources are activated; otherwise, they can be reallocated to other users, creating a dynamic resource management system that adapts to changing conditions and optimizes both speed and efficiency.
3Loss of time
If buffer information reporting is enabled for other STAs, then AP can timely schedule low-latency traffic, but system complexity increases
Solution Approach 1:
The patent extracts buffer information reporting as a separate, dedicated function that operates independently from general uplink transmission procedures. By isolating this specific reporting mechanism for latency-sensitive traffic, the system can efficiently handle time-critical information without complicating the overall transmission protocol, allowing AP to quickly identify and schedule STAs with urgent traffic while maintaining simple and clear procedural frameworks.
Data Source
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AI summary
A method and device for wireless communication are provided. A first STA reserves m1 frequency domain units in a first uplink transmission, and one or more other STAs having pending uplink low-latency traffic report buffer information of low-latency traffic on the m1 frequency domain units. Thereby, an AP can acquire the buffer information of the uplink low-latency traffic of the one or more other STAs in a contended TXOP of the first STA or a contended TXOP of the AP, thereby enabling timely transmission of event-driven uplink low-latency traffic. The method for wireless communication includes the following. The first STA reserves m1 frequency domain units in the first uplink transmission, the m1 frequency domain units are used for one or more other STAs having pending uplink low-latency traffic to report buffer information of low-latency traffic, and m1 is a positive integer.