Wake-Up Radio Parameter Update for WLAN Power Efficiency
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Solution Overview
Problem
Next-generation wireless local area networks (WLANs) face challenges in improving spectrum efficiency and area throughput, especially in dense environments with multiple access points and stations, and require power-efficient communication methods to extend battery life in IoT devices.
Innovation Solution
A method for a wireless LAN system using a Wake-Up Radio (WUR) module with On-Off Keying (OOK) modulation, allowing stations to alternate between active and doze states, with updated WUR parameters managed through control frames to optimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main radio module continuously monitors for data transmissions, then communication responsiveness is improved, but power consumption increases
Solution Approach 1:
The radio system is divided into two separate modules: a main radio module for full-featured communication and a wake-up radio module for low-power monitoring. This segmentation allows each module to be optimized for its specific function, with the wake-up radio consuming minimal power while the main radio remains active only when needed.
Solution Approach 2:
The wake-up radio module acts as an intermediary between the external wireless environment and the main radio module. It monitors for wake-up packets and triggers the main radio only when necessary, mediating between continuous monitoring requirements and power conservation goals.
2Loss of time
If the WUR module operates continuously to detect wake-up packets, then data reception timeliness is improved, but battery life deteriorates
Solution Approach 1:
The WUR module operates in periodic cycles, alternating between active monitoring states and low-power sleep states. During active periods, it monitors for wake-up packets; during sleep periods, it conserves battery energy. This periodic operation balances timely data reception with battery life extension.
Solution Approach 2:
The system dynamically changes operational parameters of the WUR module, including monitoring intervals, detection sensitivity, and transition thresholds. By adjusting these parameters, the system optimizes the balance between detection timeliness and power consumption based on current network conditions and battery status.
3Reliability
If the main radio module is activated frequently to check for data, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The wake-up packet detection function is extracted from the main radio module and assigned to a separate, dedicated WUR module. This extraction allows the main radio to remain in low-power states while the specialized WUR module handles monitoring, reducing the main radio's power consumption while maintaining communication reliability.
Solution Approach 2:
The WUR module autonomously monitors for wake-up packets and independently triggers the main radio module only when wake-up packets are detected. This self-service capability eliminates the need for frequent main radio activations, as the WUR module handles monitoring tasks without requiring main radio intervention.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances communication capability in wireless LAN systems by reducing power consumption and improving spectrum efficiency, enabling longer battery life for IoT devices while maintaining optimal performance.
Implementation Method 1
a Wake-Up Radio (WUR) module receiving a Wake-Up Radio (WUR) packet being modulated by an On-Off Keying (OOK) scheme
Data Source
AI summary
The present specification proposes a technical feature related to a wake-up radio (WUR) STA. Specifically, proposed is an operation of updating a parameter related to an operation of a WUR mode. For example, the WUR STA may update a parameter related to the WUR mode by receiving an unsolicited frame from an AP while maintaining the WUR mode. The received frame may have a preset action type.