UE DRX Wake-Up Signaling for Low-Power PDCCH Reception
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately and efficiently transmitting and receiving signals due to the need for improved signal detection and processing methods.
Innovation Solution
The implementation of a method and apparatus that utilizes discontinuous reception (DRX) configurations and wake-up signals (WUS) to transition between different signal types, allowing for more precise monitoring of physical downlink control channels (PDCCH) based on DRX configurations, with the detection time point of WUS determining resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous monitoring of PDCCH is performed in first mode, then signal reception reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) where the UE periodically switches between first mode (full signal support) and second mode (reduced signal support). During second mode, the UE monitors only wake-up signals instead of continuously monitoring PDCCH, achieving periodic operation that reduces power consumption while maintaining reliability through scheduled mode transitions.
Solution Approach 2:
The patent dynamically transitions the UE between two operational modes based on traffic conditions and DRX configuration. The UE adapts its signal monitoring capability by switching from first mode (comprehensive monitoring) to second mode (reduced monitoring), allowing the system to optimize power consumption dynamically while maintaining signal reception reliability when needed.
2Use of energy by moving object
If UE operates in second mode with reduced signal support, then power consumption is reduced, but signal detection capability deteriorates
Solution Approach 1:
The patent uses wake-up signals transmitted before PDCCH monitoring occasions to preliminarily indicate whether data transmission is scheduled. The UE detects these wake-up signals in second mode, and only transitions to first mode for full PDCCH monitoring when the wake-up signal indicates incoming data, thereby maintaining detection capability for critical signals while saving power during idle periods.
3Use of energy by moving object
If DRX configuration is applied, then power efficiency is improved, but time resource allocation complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the UE reports its mode state and wake-up signal detection results to the base station. The base station uses this feedback to optimize DRX configuration parameters and wake-up signal timing, creating a closed-loop system that manages time resource allocation complexity through continuous adaptation based on actual system performance and user needs.
Data Source
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AI summary
A method by which a terminal receives a signal in a wireless communication system, according to an embodiment of the present disclosure, comprises: receiving a discontinuous reception (DRX) configuration in a first mode in which a first type signal and a second type signal are both supported; detecting a wake-up signal (WUS) provided as the second type signal in a second mode in which only the second type signal is supported; switching, on the basis of detecting the WUS, from the second mode to the first mode for monitoring of a physical downlink control channel (PDCCH) provided as the first type signal; and monitoring the PDCCH on the basis of the DRX configuration in the first mode, wherein a time resource related to the DRX configuration may be determined on the basis of the time when the WUS is detected in the second mode.