EMLSR Multi-Link WLAN Signaling for Low-Latency Reliable Transmission
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Solution Overview
Problem
Existing wireless LAN systems lack efficient methods for transmitting and receiving information in an enhanced multi-link single-radio (EMLSR) mode, which is crucial for improving transmission rates, reliability, and reducing latency.
Innovation Solution
A method and device for implementing the EMLSR mode in wireless LAN systems, involving the exchange of multi-link elements and control frames between multi-link devices to establish and maintain enhanced communication links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing wireless LAN systems use conventional transmission methods, then the system structure remains simple, but transmission rates are limited and reliability is insufficient
Solution Approach 1:
The patent segments the transmission system into multiple independent links (first link, second link, third link) with different characteristics. Each link can be optimized separately for specific transmission requirements, enabling enhanced reliability through diversification while maintaining manageable complexity through modular link design.
Solution Approach 2:
The patent introduces a new dimension of operation by enabling simultaneous transmissions on multiple links with different protocols (HE protocol, EHT protocol, and legacy protocol). This multi-dimensional approach allows the system to achieve higher reliability through protocol diversity and spatial separation without being constrained by a single transmission path.
2Productivity
If multiple links are established for enhanced transmission, then transmission rate and reliability improve, but latency increases due to link setup overhead
Solution Approach 1:
The patent performs preliminary actions by pre-establishing multiple links with different protocols before actual data transmission begins. The HE link, EHT link, and legacy link are set up in advance, allowing the system to immediately utilize multiple transmission paths when data needs to be sent, thereby reducing latency while maintaining high transmission rates.
Solution Approach 2:
The patent ensures continuity of useful action by maintaining multiple active links that can be used continuously for transmission. Rather than establishing links on-demand, the system keeps the HE link, EHT link, and legacy link ready and operational, enabling uninterrupted high-rate transmission without repeated link setup delays.
3Reliability
If EMLSR mode is implemented with multiple links, then ultra-high reliability is achieved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a multi-link device that can operate across multiple protocols (HE, EHT, and legacy) simultaneously. The same device structure supports diverse transmission requirements through a unified multi-link architecture, achieving ultra-high reliability through protocol diversity while avoiding the complexity of separate dedicated systems for each protocol.
Solution Approach 2:
The patent utilizes parameter changes to manage complexity by dynamically adjusting operational parameters across different links. The system can switch between HE protocol, EHT protocol, and legacy protocol based on transmission requirements, using parameter modification rather than structural complexity to achieve ultra-high reliability.
Data Source
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AI summary
Disclosed are an enhanced multi-link single-radio (EMLSR) mode-based information transmission and reception method and device in a wireless LAN system. A method performed by a STA belonging to a first MLD, according to one embodiment of the present disclosure, may comprise the steps of: receiving, from a STA belonging to a second MLD, a multi-link element related to the setup of a plurality of links; receiving, from the STA belonging to the second MLD, a control frame for initiating an EMLSR mode; and on the basis of the EMLSR mode, exchanging a frame with the STA belonging to the second MLD. Here, the multi-link element may include information on at least one link, from among the plurality of links, which is related to the EMLSR mode.