WLAN Stream Classification Using LL IDs for Low-Latency Traffic
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Solution Overview
Problem
Existing wireless LAN systems lack effective methods for classifying low-latency traffic and announcing ID information and Quality of Service (QoS) characteristics, which are crucial for managing real-time and ultra-high reliability communications.
Innovation Solution
A method and device for classifying low-latency traffic by transmitting and receiving request and response frames with included SCS and LL-related IDs, enabling ID information and QoS characteristic announcement between stations in a stream classification service process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing wireless LAN systems are used without stream classification service, then device complexity is reduced, but the capability to classify and manage low-latency traffic is insufficient
Solution Approach 1:
The patent segments the wireless LAN traffic classification process into distinct components: SCS ID for stream identification and LL-related ID for low-latency traffic classification. This segmentation allows the system to handle different traffic types through separate identification mechanisms, enhancing adaptability while maintaining manageable complexity through modular design
Solution Approach 2:
The patent implements a universal SCS framework that can handle both general stream classification and specific low-latency traffic classification. The SCS request and response frames are designed to carry multiple types of information (SCS ID, LL-related ID, QoS parameters) that can serve different traffic classification needs, making the system versatile without requiring separate mechanisms for each traffic type
2Measurement precision
If SCS procedure with multiple ID information is implemented, then traffic classification precision is improved, but frame structure complexity increases
Solution Approach 1:
The patent nests the LL-related ID information within the SCS frame structure. The SCS request frame contains both SCS ID and LL-related ID fields, where the LL-related ID provides additional classification precision for low-latency traffic. This nested structure allows precise multi-level classification while reusing the existing SCS frame format, thereby limiting the increase in frame structure complexity
Solution Approach 2:
The patent performs preliminary classification by including both SCS ID and LL-related ID in the SCS request frame before actual traffic transmission. This preliminary action allows the receiving station to pre-process and classify traffic based on multiple identification criteria, improving classification precision while organizing the frame structure in advance to avoid complexity during real-time processing
3Productivity
If LL-related ID is commonly applied to multiple STAs, then system productivity is improved, but individual STA customization capability is reduced
Solution Approach 1:
The patent applies local quality by allowing the LL-related ID to serve different purposes for different STAs. While the LL-related ID format and processing mechanism is common across multiple STAs (improving productivity), each STA can be configured with specific LL-related ID values and QoS parameters tailored to its requirements (maintaining customization capability). The receiving station processes LL-related IDs based on STA-specific associations
Data Source
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AI summary
Disclosed are a method and apparatus for classifying low-latency traffic in a wireless LAN system. The method performed by a first STA in a wireless LAN system, according to one embodiment of the present disclosure, may comprise the steps of: transmitting, to a second STA, a request frame for a stream classification service (SCS) process; and receiving, from the second STA, a response frame for the request frame. At least one of the request frame and the response frame comprises first information indicating an SCS ID and second information indicating a low latency (LL)-related ID for classifying LL traffic, wherein the LL-related ID may be commonly applied to one or more STAs associated with the second STA.