Wireless LAN Queue Segmentation for Latency-Sensitive Traffic
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Solution Overview
Problem
Existing wireless LAN systems face challenges in efficiently handling latency-sensitive traffic, requiring improved methods for configuring queues and time intervals for transmission and reception to enhance latency performance.
Innovation Solution
A method and device for configuring a queue for latency-sensitive traffic and setting a time interval for transmitting and receiving data, utilizing predefined candidate traffic identifier values for low latency traffic in a wireless LAN system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If existing queue configurations are used for wireless LAN traffic, then general traffic handling is maintained, but latency-sensitive traffic experiences insufficient latency performance
Solution Approach 1:
The patent segments traffic into different queues based on latency sensitivity. A specific queue is configured separately for latency-sensitive traffic (using candidate TID values) while other traffic uses existing queues. This segmentation allows differentiated handling where latency-sensitive packets receive priority processing without requiring complete redesign of the entire queue system.
Solution Approach 2:
The patent performs preliminary configuration of a dedicated queue for latency-sensitive traffic before actual data transmission. The queue parameters, time intervals, and TID mappings are pre-established, enabling immediate priority handling when latency-sensitive packets arrive, rather than reacting to latency issues during transmission.
2Loss of time
If a dedicated queue for latency-sensitive traffic is configured, then latency performance is improved, but system complexity increases
Solution Approach 1:
The patent applies local quality by providing specialized queue configuration only for latency-sensitive traffic while leaving general traffic handling unchanged. The dedicated queue has specific properties (time intervals, priority levels) tailored to latency requirements, while other queues maintain their existing configurations. This localized approach improves latency performance without requiring system-wide complexity increases.
Solution Approach 2:
The patent creates a multi-functional queue system where the dedicated latency-sensitive queue can handle various types of low-latency traffic through candidate TID values. This single queue structure serves multiple latency-sensitive applications simultaneously, reducing the need for separate queues for each traffic type and thereby limiting complexity growth.
3Productivity
If time intervals are configured for dedicated queue transmission, then transmission efficiency is improved, but scheduling complexity increases
Solution Approach 1:
The patent implements periodic transmission intervals for the dedicated latency-sensitive queue. Data packets in this queue are transmitted at predetermined time intervals rather than continuously or on-demand. This periodic action optimizes transmission efficiency by preventing buffer overflow and ensuring timely delivery, while the regular pattern simplifies scheduling compared to adaptive or event-driven approaches.
Data Source
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AI summary
A method and a device for transmitting/receiving latency sensitive traffic in a wireless LAN system are disclosed. The method performed by means of a first STA in the wireless LAN system, according to one embodiment of the present disclosure, may comprise the steps of: transmitting, to a second STA, information about data included in a specific queue for low-latency; receiving, from the second STA, information about a time section for data transmission/reception, and transmitting, to the second STA, a PPDU including the data in the time section. Here, the data can be transmitted in traffic designated as one from among candidate traffic identifier (candidate TID) values pre-defined for low-latency.