Multi-Link WLAN Power Saving with Active Mode Capability Switching
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Solution Overview
Problem
Existing power saving mechanisms in IEEE 802.11bn systems are inefficient for AP devices, particularly in transitioning between lower and higher capability modes, and do not optimize energy consumption when operating in enhanced multi-link configurations.
Innovation Solution
The proposed solution introduces EMLSR-based and EMLMR-based power saving protocols for both non-AP and AP MLDs, allowing devices to operate in a lower capability mode for listening and transition to a higher capability mode for transmitting frames, with mechanisms to manage the transition delay and optimize energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the station enters a dozing state to save power, then power consumption is reduced, but the ability to transmit and receive data is lost
Solution Approach 1:
The patent applies dynamics by enabling the STA to dynamically transition between different capability modes (lower and higher) based on communication needs. The STA can switch from lower capability mode (for power saving) to higher capability mode (for full functionality) when data transmission is required, making the system adaptable rather than static.
Solution Approach 2:
The patent segments the active state into two distinct capability modes: lower capability mode with limited characteristics for power saving, and higher capability mode with full characteristics for complete functionality. This segmentation allows the system to operate in a power-efficient mode during idle periods while maintaining the ability to access full capabilities when needed.
2Use of energy by moving object
If the STA operates in lower capability mode with limited characteristics, then power consumption is reduced, but bandwidth and data rates are limited
Solution Approach 1:
The STA dynamically adjusts its operational characteristics by switching between capability modes. When operating in lower capability mode, the STA uses reduced bandwidth and limited streams to conserve power. When data transmission is required, the STA transitions to higher capability mode to access full bandwidth and data rates, making the system responsive to actual communication needs.
Solution Approach 2:
The patent changes operational parameters (bandwidth, number of streams, encoding schemes) based on the capability mode. In lower capability mode, parameters are adjusted to reduce power consumption, while in higher capability mode, parameters are optimized for maximum data transmission rate, allowing the system to adapt its performance characteristics to current requirements.
3Adaptability or versatility
If the STA transitions from lower capability mode to higher capability mode, then full functionality is restored, but transition delay occurs
Solution Approach 1:
The patent applies preliminary action by having the STA perform capability mode transitions in advance or maintain readiness to transition quickly. The system prepares for mode switching by maintaining the ability to rapidly change operational parameters, reducing the effective transition delay when full functionality is needed.
Data Source
AI summary
A multiple link device (MLD) for performing a wireless communications protocol to provide dynamic power saving (PS) on a wireless local area network (WLAN). The Active state (non-dozing) comprises both a full capability higher powered state, and a lower powered state in which it has less capability. Wherein stations of an MLD can be directed to listen using the lower power active mode; yet a transition to the higher power active mode can be made when the need arises for transmitting frames with another MLD.