LP-WUS Monitoring in Connected Terminals for Lower Power Reception
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Solution Overview
Problem
Existing terminal devices face high power consumption when receiving downlink signals due to the lack of effective methods for monitoring low power wake up signals (LP-WUS) in a connected state.
Innovation Solution
A method for a terminal device to determine conditions for monitoring LP-WUS, including receiving first information from a network device or determining the absence of scheduling information, and a network device to align with the terminal device on when to send LP-WUS, using channel quality parameters and timers to optimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device uses the main circuit to receive downlink signals, then the signal reception is reliable, but the power consumption is high
Solution Approach 1:
The terminal device is divided into two functional segments: a low-power wake-up circuit for receiving wake-up signals and a main circuit for receiving full downlink signals. This segmentation allows the terminal to use minimal power for wake-up detection while maintaining full functionality when needed, resolving the contradiction between power consumption and signal reception reliability.
Solution Approach 2:
The wake-up circuit performs preliminary action by detecting wake-up signals before the main circuit is activated. This preliminary detection determines whether the main circuit needs to be turned on, avoiding unnecessary activation and reducing power consumption while ensuring reliable signal reception only when necessary.
2Use of energy by moving object
If the terminal device uses a wake-up circuit to receive downlink signals, then the power consumption is reduced, but the terminal cannot monitor LP-WUS in connected state
Solution Approach 1:
The wake-up circuit is designed with multi-functionality to handle both idle/inactive state wake-up signals and connected state LP-WUS monitoring. By enhancing the wake-up circuit's capabilities, it can perform diverse functions across different states, resolving the contradiction between power savings and monitoring versatility.
Solution Approach 2:
The system dynamically adjusts the monitoring behavior based on the terminal's state. In idle/inactive states, the wake-up circuit monitors for wake-up signals, while in connected states, it monitors for LP-WUS. This dynamic adaptation allows the same circuit to serve different purposes, maintaining power efficiency while expanding functionality.
3Reliability
If the terminal device continuously monitors PDCCH, then the communication reliability is maintained, but the power consumption increases
Solution Approach 1:
Instead of continuous monitoring, the terminal device employs periodic monitoring of wake-up signals and LP-WUS at specific intervals. This periodic action maintains communication reliability by periodically checking for incoming signals while significantly reducing power consumption compared to continuous monitoring.
Solution Approach 2:
The wake-up circuit performs self-service by autonomously detecting wake-up signals and LP-WUS, then controlling the main circuit's activation. This self-service mechanism eliminates the need for continuous main circuit operation, maintaining communication reliability only when necessary while minimizing power consumption during idle periods.
Data Source
AI summary
A communication method and apparatus are provided, to provide a solution to monitoring an LP-WUS by a terminal device. A terminal device determines whether a condition for monitoring a low power wake up signal LP-WUS is met; and the terminal device monitors the LP-WUS when determining that the condition for monitoring the LP-WUS is met. The LP-WUS is for waking up the terminal device. Therefore, how to activate a related procedure of monitoring the LP-WUS by the terminal device may be provided.