EMLSR Trigger Frame Control for Single-Active-Link Overhead
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Solution Overview
Problem
In wireless communications, the use of initial control frames in Enhanced Multi-Link Single Radio (EMLSR) leads to performance overhead and inefficiencies due to the need for antenna switching and power-save mode transitions, particularly when only one link is active.
Innovation Solution
Implementing dynamic initial trigger frame control by enabling frame exchanges without initial control frames on the active link, allowing subsequent frame exchanges to occur without such frames, and managing power-save modes to optimize communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If initial control frames are transmitted in EMLSR mode, then frame exchanges can be initiated on active links, but performance overhead increases due to padding and power-save mode transitions
Solution Approach 1:
The patent extracts and removes the initial control frame from the frame exchange process when only one link is active. By detecting the single-active-link condition, the system eliminates the unnecessary MU-RTS or BSRP frames, thereby removing the source of performance overhead while maintaining reliable frame exchanges through direct data frame transmission.
Solution Approach 2:
The patent implements dynamic control of initial trigger frames based on real-time link status. The access point monitors the number of active EMLSR links and adaptively decides whether to transmit initial control frames. This dynamic adjustment allows the system to optimize performance by eliminating padding and power-save transitions when only one link is active, while maintaining reliability when multiple links are active.
2Reliability
If initial control frames are transmitted with padding for antenna switching time, then antenna switching can be completed, but transmission time and efficiency are reduced
Solution Approach 1:
The patent removes the padding addition step from the initial control frame transmission process when operating in single-active-link mode. By detecting that antenna switching is unnecessary in this condition, the system extracts and eliminates the padding operation, thereby reducing transmission time without compromising antenna switching requirements.
Solution Approach 2:
The patent performs preliminary detection of the link status before transmitting initial control frames. By proactively identifying when only one link is active, the system can preemptively eliminate unnecessary padding and power-save mode transitions, thereby preventing time loss before the transmission occurs.
3Use of energy by moving object
If STA transitions multiple EMLSR links to power-save mode, then energy consumption is reduced, but initial control frame transmission becomes necessary and increases overhead
Solution Approach 1:
The patent implements dynamic adjustment of power-save mode behavior based on the number of active links. When only one link is active, the system dynamically modifies its operation to eliminate initial control frame transmission, thereby maintaining low energy consumption without incurring the overhead of MU-RTS or BSRP frames. This dynamic control allows the system to optimize both energy efficiency and performance simultaneously.
Solution Approach 2:
The patent employs feedback mechanisms where the access point monitors the active link status and uses this information to control the transmission of initial control frames. The feedback loop detects when all but one link are in power-save mode and automatically adjusts the frame transmission strategy, thereby eliminating unnecessary overhead while maintaining energy-efficient operation.
Data Source
AI summary
Techniques pertaining to dynamic initial trigger frame control in enhanced multi-link single radio (EMLSR) in wireless communications are described. A first multi-link device (MLD) performs a frame exchange with a second MLD on a first link of multiple communication links without transmission of an initial control frame. The first MLD then enables transmission of initial control frames in subsequent frame exchanges with the second MLD on the first link.