STA Multi-Link Roaming Power Coordination for Stable Target Links
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Solution Overview
Problem
Existing link transition methods in wireless communication systems fail to ensure the reliability of newly established links during roaming, leading to instability and interruptions in data transmission.
Innovation Solution
The method involves transmitting power control information during link transition to control the transmit power of candidate access points (APs) or target APs, ensuring reliable link establishment between a station (STA) and a target AP using multi-link devices (MLDs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If link transition is performed without power control information, then the transition process is simple, but the reliability of the newly established link is poor
Solution Approach 1:
The patent applies preliminary action by transmitting power control information before the link transition is completed. The STA MLD determines the target AP MLD and transmits power control information for the target link in advance, during the transition process, so that the target AP MLD can prepare the appropriate transmit power before the link is fully established. This ensures reliable link establishment without adding complex post-transition adjustments.
Solution Approach 2:
The patent implements feedback by having the STA MLD transmit power control information based on the determined target AP MLD, and the target AP MLD uses this feedback to adjust its transmit power accordingly. This closed-loop feedback mechanism ensures that the target link achieves the desired reliability by coordinating power levels between the STA MLD and target AP MLD during the transition process.
2Reliability
If transmit power of candidate AP MLDs is increased during link transition, then the reliability of target link is improved, but interference to other links increases
Solution Approach 1:
The patent applies local quality by transmitting power control information specifically for the target link rather than uniformly adjusting power across all links. The power control information is tailored to the specific target AP MLD and target link conditions, allowing precise power adjustment only where needed for the transitioning link, while leaving other links unaffected. This localized approach improves target link reliability without causing widespread interference.
Solution Approach 2:
The patent uses preliminary action by determining the target AP MLD and calculating appropriate power control information before the link transition completes. This allows the system to pre-coordinate power levels to achieve the necessary signal strength for reliable connection while avoiding excessive power increases that would cause interference to other links. The power control is planned and executed in advance rather than reactively adjusted.
Data Source
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AI summary
The present application relates to the field of communications. Disclosed are a link switching method and apparatus, and a device and a medium. The method comprises: during the process of switching a first source link to a first target link, sending power control information, wherein the power control information is used for controlling the transmission power of candidate AP MLDs or a target AP MLD, the first source link is at least one link corresponding to a STA MLD and a source AP MLD, and the first target link is at least one link corresponding to the STA MLD and the target AP MLD, the target AP MLD being an AP MLD among the candidate AP MLDs. The method provided in the present application is conducive to improving the reliability of a first target link.