Wake-Up Signal Configuration for Wireless Terminal Power Management
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting and receiving Wake-Up Signals (WUS) due to the need for improved mobile broadband communication and massive machine-type communications, particularly in next-generation wireless access technologies like New Radio (NR), which require optimized signal configuration and resource management to enhance reliability and latency.
Innovation Solution
A method and apparatus for efficiently receiving downlink signals in a wireless communication system, where user equipment (UE) receives configuration information for enabling or disabling WUS, and when enabled, monitors the WUS and corresponding channels, with configuration options available at UE-specific, cell-common, and resource part-specific levels, allowing for flexible WUS management based on coverage thresholds and layer signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If WUS monitoring is enabled for all UEs, then wake-up signal reliability is improved, but power consumption and overhead increase for UEs that do not require WUS
Solution Approach 1:
The patent applies local quality by enabling WUS monitoring selectively for specific UEs based on their coverage characteristics. UEs in coverage enhancement modes (CE Mode A or B) are configured to monitor WUS, while UEs in normal coverage mode are not. This targeted approach ensures reliable wake-up signaling for UEs that need it most (those with poor coverage) while avoiding unnecessary power consumption for UEs in good coverage conditions.
Solution Approach 2:
The patent changes the parameter of WUS monitoring configuration from a uniform system-wide setting to a UE-specific parameter that varies based on coverage enhancement mode. The network configures WUS monitoring parameters (such as monitoring occasions, frequency resources) differently for UEs in different coverage modes, optimizing both reliability and power efficiency for each UE category.
2Use of energy by moving object
If WUS configuration is made UE-specific, then power efficiency is improved, but device complexity and configuration overhead increase
Solution Approach 1:
The patent manages configuration complexity by changing the parameter structure to use standardized coverage enhancement mode indicators that the UE already maintains for other purposes. Rather than introducing entirely new UE-specific configuration parameters, the system leverages existing mode classification (CE Mode A/B) to derive WUS monitoring requirements, reducing the burden on both network and UE.
Solution Approach 2:
The patent segments the UE population into distinct groups based on coverage enhancement modes, with each segment receiving appropriate WUS configuration. This segmentation approach simplifies configuration management by handling UEs in batches based on their mode rather than individually, reducing overall system complexity while maintaining UE-specific optimization.
3Reliability
If WUS monitoring is enabled for UEs in coverage enhancement modes, then wake-up reliability is improved, but signal detection difficulty increases due to channel conditions
Solution Approach 1:
The patent applies preliminary action by having UEs in coverage enhancement modes pre-configure WUS monitoring parameters and expectations before the actual WUS transmission. The network also prepares and transmits WUS using appropriate coverage enhancement techniques (such as repetition, power boosting) in advance of the UE's wake-up decision, ensuring the signal is detectable despite challenging channel conditions.
Solution Approach 2:
The patent changes detection parameters dynamically based on coverage mode. UEs in CE Mode A or B use different detection thresholds, monitoring occasions, and signal processing parameters compared to normal mode UEs. The network also adjusts transmission parameters (power, repetition factor) based on the target UE's coverage mode, making the signal detectable despite channel difficulties.
Data Source
AI summary
The present invention relates to a method by which a terminal transmits/receives a signal in a wireless communication system and a device therefore and, more particularly, to: a method comprising the steps of receiving configuration information related to the activation or the deactivation of a wake-up signal (WUS), and monitoring the WUS and a channel corresponding to the WUS, when the WUS is activated on the basis of the configuration information, wherein the configuration information related to the activation or the deactivation of the WUS is configured to be terminal-specific; and a device therefor.