WLAN Link Indication for Low-Latency Traffic Negotiation
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Solution Overview
Problem
Existing wireless LAN systems lack an effective method to indicate links for specific types of traffic, particularly low-latency traffic, which is crucial for supporting advanced communication requirements such as low-latency and ultra-high reliability.
Innovation Solution
A stream classification service (SCS) negotiation procedure is introduced, where stations exchange SCS request and response frames to negotiate and indicate links for transmitting and receiving specific types of traffic, including low-latency traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing wireless LAN systems are used without link indication for specific traffic types, then the system structure remains simple, but the ability to support low-latency and ultra-high reliability traffic is insufficient
Solution Approach 1:
The patent segments traffic into different types (e.g., low-latency traffic, ultra-high reliability traffic) and assigns specific links for each traffic type. This is achieved through link indication information in SCS request/response frames that specifies which links should be used for negotiating specific traffic types, allowing differentiated handling without requiring complete system redesign.
Solution Approach 2:
The patent performs preliminary link indication and negotiation before actual data transmission. The SCS (Stream Classification Service) negotiation procedure includes exchanging request and response frames that pre-establish link assignments for different traffic types, ensuring that appropriate links are ready before low-latency or ultra-high reliability traffic needs to be transmitted.
2Adaptability or versatility
If link indication information is added to SCS request and response frames, then links for specific traffic types can be indicated, but the frame structure becomes more complex
Solution Approach 1:
The patent makes the existing SCS request and response frames multi-functional by adding link indication information to their existing structure. These frames continue to serve their original purpose of stream classification service negotiation while simultaneously carrying link indication information, eliminating the need for separate dedicated frames and minimizing structural complexity increase.
3Productivity
If multiple links are supported for different traffic types, then traffic handling capability is improved, but the negotiation procedure becomes more complex
Solution Approach 1:
The patent segments the negotiation process by including link indication information that separately identifies links for different traffic types within the SCS procedure. This allows the negotiation to handle multiple links systematically by specifying which link serves which traffic type, making the complex multi-link negotiation manageable through structured information elements.
Data Source
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AI summary
Disclosed are a method and device for indicating a link for a specific type of traffic in a wireless LAN system. A method by which a first station (STA) carries out in a wireless LAN system, according to an embodiment of the present disclosure, may comprise the steps of: transmitting a stream classification service (SCS) request frame to a second STA, the SCS request frame comprising information related to negotiation of a specific type of traffic; and receiving a SCS response frame from the second STA in response to the SCS request frame. Here, at least one of the SCS request frame or the SCS response frame may comprise link-related information indicating at least one link through which the specific type of traffic is to be transmitted and received.