WUR Module OOK Wake-Up Packet Control for WLAN Power
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Solution Overview
Problem
Next-generation wireless local area networks (WLANs) face challenges in enhancing performance, particularly in dense environments with multiple access points and stations, where spectrum efficiency and area throughput need improvement, especially in indoor and outdoor settings with high user loads and interference.
Innovation Solution
A method for communication in a wireless LAN system involving a wireless terminal with a main radio module and a wake-up radio (WUR) module, where the WUR module receives a wake-up packet modulated using the OOK scheme to control the main radio module to remain in a doze state until a predetermined wake-up time, optimizing power consumption and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main radio module continuously monitors for data transmissions, then data reception reliability is improved, but power consumption increases
Solution Approach 1:
The radio module is divided into two functional parts: a low-power wake-up radio module that continuously monitors for wake-up packets, and a main radio module that operates in doze state and activates only when needed. This segmentation allows continuous monitoring functionality to be separated from the high-power main radio, resolving the contradiction between reliability and power consumption.
Solution Approach 2:
The wake-up radio module acts as an intermediary between the external environment and the main radio module. It receives wake-up packets and triggers the main radio module to wake up only when data is actually available, preventing unnecessary activation of the high-power main radio and thus reducing overall power consumption while maintaining data reception reliability.
2Loss of time
If the main radio module wakes up frequently to check for data, then data reception timeliness is improved, but power consumption increases
Solution Approach 1:
The wake-up radio module performs preliminary monitoring action continuously in a low-power state, detecting the presence of data before the main radio module needs to activate. This preliminary detection mechanism ensures data reception timeliness by notifying the main radio exactly when data is available, eliminating the need for frequent unnecessary wake-ups and reducing power consumption.
3Use of energy by moving object
If a wake-up radio module is added to enable selective waking, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The wake-up radio functionality is extracted as a separate, dedicated module from the main radio system. This extraction allows the wake-up radio to be optimized independently with simplified circuitry designed specifically for low-power wake-up packet detection, while the main radio module maintains its full functionality. The separation reduces overall system complexity by dividing functions into specialized components rather than requiring a single complex radio to handle all functions.
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
This approach enhances communication performance and reduces power consumption in wireless LAN systems by allowing the main radio module to wake up only when necessary, improving spectrum efficiency and area throughput in dense environments.
Implementation Method 1
receiving, by a first wireless terminal including a main radio module and a WUR module for receiving a wake-up packet modulated based on OOK scheme, the wake-up packet
Data Source
AI summary
A method for communication in a wireless LAN system according to an embodiment includes: receiving, by a first wireless terminal including a main radio module and a WUR module for receiving a wake-up packet modulated based on OOK scheme, the wake-up packet from a second wireless terminal based on the WUR module, wherein the wake-up packet includes first information indicating that a broadcast scheme is applied to the wake-up packet and second information for indicating the presence of a group addressed frame buffered by the second wireless terminal; and controlling, by the first wireless terminal, the main radio module such that the main radio module remains in a doze state until a predetermined wake-up time after reception of the wake-up packet.