Wireless LAN Low-Latency Sections for Time-Sensitive Traffic
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Solution Overview
Problem
Wireless LAN systems face challenges in supporting time delay-sensitive traffic due to lower transmission speeds and interference, making it difficult to maintain low latency communication, especially in the unregulated Industrial Scientific and Medical (ISM) band.
Innovation Solution
Implementing a method for low latency communication by transmitting a notification frame, configuring a section for low latency communication, and terminating it with a termination frame, allowing APs to manage and facilitate efficient transmission of time delay-sensitive traffic within the BSS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless LAN uses standard transmission protocols in the ISM band, then communication coverage and compatibility are maintained, but transmission speed decreases and latency increases for time delay-sensitive traffic
Solution Approach 1:
The wireless LAN communication is divided into two distinct sections: a first section using standard protocols for general traffic, and a second section using low latency communication protocols for time delay-sensitive traffic. This segmentation allows each section to be optimized independently, resolving the contradiction between compatibility and low latency.
Solution Approach 2:
Different communication quality characteristics are applied to different traffic types. Standard protocol characteristics are used for general traffic, while specialized low latency characteristics are applied specifically to time delay-sensitive traffic in the second section, allowing optimal performance for each traffic category.
2Loss of time
If wireless LAN increases transmission speed to reduce latency, then time delay-sensitive traffic performance improves, but interference from surroundings increases and communication stability deteriorates
Solution Approach 1:
The communication channel is segmented into two sections with different protocol characteristics. The second section is specifically designed for low latency communication with parameters optimized to handle interference, allowing high-speed transmission without being affected by environmental interference that would impact standard protocols.
Solution Approach 2:
Communication parameters such as modulation schemes, coding rates, and transmission power are changed specifically for the second section to optimize for low latency while maintaining robustness against interference. These parameter adjustments enable the system to achieve low latency performance without being overly sensitive to environmental interference.
3Productivity
If a dedicated low latency section is configured, then time delay-sensitive traffic transmission efficiency improves, but system complexity and management overhead increase
Solution Approach 1:
The system is segmented into two operational sections that can be independently managed. The first section handles general traffic with standard protocols, while the second section is dedicated to low latency traffic. This segmentation allows the low latency section to be activated only when needed, reducing overall system complexity while maintaining high transmission efficiency for time-critical traffic.
Solution Approach 2:
The low latency communication section is configured dynamically based on traffic requirements. The AP can activate or deactivate the second section according to the presence of time delay-sensitive traffic, allowing the system to adapt its complexity level to actual needs rather than maintaining fixed high complexity continuously.
Data Source
AI summary
One embodiment according to the present specification relates to a method for performing low latency communication. A transmitting STA can transmit a low latency communication notification frame including information related to a section for low latency communication. The transmitting STA and a receiving STA can perform low latency communication in the section for low latency communication on the basis of the low latency communication notification frame. Afterward, the transmitting STA can transmit a low latency communication termination frame. The transmitting STA and the receiving STA can terminate the section for low latency communication on the basis of the low latency communication termination frame.