Wi-Fi Multi-Link Power Saving with Dynamic Capability Switching
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Solution Overview
Problem
Existing Wi-Fi communication systems face challenges in power management, particularly for access points, leading to increased power consumption and reduced device lifespan in multi-link operation environments.
Innovation Solution
Implementing a cross-link dynamic power saving operation that allows access points and stations to switch between lower and higher capability modes based on frame analysis, using a method and apparatus that includes transceivers, processors, and memory to manage power save modes across multiple links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If access points operate in higher capability mode continuously, then communication performance is improved, but power consumption increases
Solution Approach 1:
The access point dynamically switches between lower capability mode (LCM) and higher capability mode (HCM) based on communication requirements. The system determines whether to switch modes based on frame analysis and communication state, allowing the access point to adapt its capability level rather than operating continuously at high performance, thus reducing power consumption when high performance is not needed.
Solution Approach 2:
The invention changes the operational parameters of the access point by switching between different capability modes. The system modifies key parameters such as transmission power, data rate, and link selection based on the current communication state, enabling the access point to operate efficiently at lower parameters when possible while maintaining the ability to switch to higher parameters when performance is required.
2Use of energy by moving object
If access points switch between power save modes frequently, then power consumption is reduced, but communication reliability deteriorates
Solution Approach 1:
The access point uses feedback from frame analysis to determine when to switch between power save modes. The system monitors communication state through received frames and uses this feedback to make informed decisions about mode switching, ensuring that transitions occur at appropriate times when communication requirements are known, thus maintaining reliability while achieving power savings.
Solution Approach 2:
The invention performs preliminary determination of mode switching based on frame analysis before actual mode transitions occur. The access point evaluates the communication state in advance and prepares for mode switching at optimal moments, ensuring that power save mode transitions do not disrupt ongoing communications and that high capability mode is activated in time when performance is needed.
3Productivity
If multiple links are used for data transmission, then data throughput is improved, but device complexity increases
Solution Approach 1:
The invention segments data transmission across multiple links (first link and second link) in a multi-link operation environment. The access point can distribute data traffic across different wireless links, utilizing available links according to communication requirements. This segmentation allows high throughput by parallel transmission while managing complexity through structured link selection and data distribution mechanisms.
Data Source
AI summary
A method performed by an access point in a wireless local area network (WLAN) system is provided. The method includes receiving, from a station, a first frame on a first link in a lower capability mode (LCM) among power save modes, determining, based on the first frame, whether to switch to a higher capability mode (HCM) among the power save modes and whether to switch a link for receiving data based on the first frame, and transmitting, to the station, a response frame for the first frame on the first link, wherein in case that it is determined to switch the power save mode to the HCM and to switch the link for receiving the data to a second link, the response frame includes information indicating that the data is to be transmitted on the second link.