Low Latency Communication Frame Exchange in Wireless LAN
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Solution Overview
Problem
Wireless local area networks (WLANs) face challenges in supporting time delay-sensitive traffic due to lower transmission speeds and interference in wireless environments compared to wired systems, making it difficult to maintain low latency for real-time audio/video transmissions.
Innovation Solution
A method for performing low-latency communication in a WLAN system by transmitting and receiving a low-latency communication request and response frame, allowing STAs to exchange parameters for optimizing latency-sensitive traffic, and reporting current latency conditions to efficiently manage low-latency communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If wireless LAN uses standard transmission methods, then compatibility with existing systems is maintained, but latency increases and time delay-sensitive traffic cannot be supported
Solution Approach 1:
The patent segments the communication protocol into distinct frames: low-latency communication request frame containing first information, and low-latency communication response frame containing second information. This segmentation allows standardized Wi-Fi infrastructure to be used while adding low-latency functionality through specific frame types and information fields, resolving the contradiction between reducing latency and maintaining protocol simplicity.
Solution Approach 2:
The patent changes transmission parameters by including parameter information in the request and response frames, allowing dynamic adjustment of transmission characteristics for low-latency traffic. This enables the system to modify parameters such as transmission timing and resource allocation without requiring a complete protocol redesign, thus reducing latency while maintaining compatibility with existing wireless LAN infrastructure.
2Speed
If wireless transmission speed is increased, then transmission time is reduced, but interference from surroundings increases
Solution Approach 1:
The patent applies preliminary action by exchanging parameter information before actual data transmission occurs. The request frame includes first information about desired parameters, and the response frame includes second information confirming selected parameters. This preliminary parameter exchange allows the system to optimize transmission speed and timing in advance, reducing the impact of interference during actual data transmission by pre-establishing optimal transmission conditions.
3Loss of time
If central base station monopoly is implemented, then channel access is controlled, but wireless LAN cannot support time delay-sensitive traffic effectively
Solution Approach 1:
The patent introduces dynamics to channel access control by using request-response frame exchanges that allow flexible parameter negotiation. Instead of static central control, the system dynamically adjusts transmission parameters based on real-time conditions and traffic requirements. The request frame can specify desired parameters for time delay-sensitive traffic, and the response frame confirms optimized settings, enabling dynamic adaptation to varying channel conditions and traffic patterns while maintaining ease of operation through standardized frame formats.
Data Source
AI summary
An example according to the present specification relates to a method for performing low latency communication. A transmission STA and a reception STA may exchange a low latency communication request frame and a low latency communication response frame. The low latency communication request frame may include first information for performing the low latency communication. The first information may include at least one among information for requesting parameters for the low latency communication and information about traffic. In addition, the low latency communication response frame may include second information for performing the low latency communication. The second information may include information about the parameters for the low latency communication. The reception STA and the transmission STA may perform the low latency communication with the transmission STA on the basis of the first information and the second information.